Sphinginae subfamily
 Sphingini tribe:
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Agrius cingulata  WO,  unlikely stray:
Enountered in Kennebec County as stray from further south. It might appear in fall, but is unlikely.
Very strong flier, frequently encountered far north of its usual range.
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Ceratomia amyntor  WO,  Elm Sphinx, Four-horned Sphinx:
Brown with dark brown and white markings including white costal area near  wing base, dark 
streaks along  veins, and  white spot in the cell.  Elm (Ulmus), birch (Betula), basswood (Tilia), cherry (Prunus).
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Ceratomia undulosa  WO,  Waved Sphinx:
Pale brownish gray (sometimes dark) with wavy black and white lines and  black-outlined white cell spot. 
Hw gray with diffuse darker bands.  |   
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Dolba hyloeus  WO,  Pawpaw Sphinx:
Dark brown with  dusting of white scales. Some moths have patches of reddish or yellowish brown on  
wings. Larvae not limited to pawpaw.
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Lapara bombycoides  WO, Northern Pine Sphinx:
Gray with heavy black bands. The upperside of the hindwing is brownish gray with no markings.
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Lintneria eremitus  WO,  Hermit Sphinx:
Gray-brown with wavy lines, black dashes, and one or two small white spots near the center of the costa.
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Manduca sexta  BAMONA, Carolina Sphinx:
Abdomen usually has six pairs of yellow bands, broken across back. Sixth set of markings quite small.
Forewing has indistinct black, brown, white markings. 
Larvae get very large, can strip tomato plant. |   
  
 | Sphinx canadensis  WO, Canadian Sphinx:
Uncommon,  not often reported anywhere, but it is reported in nearby  Aroostook County. Larval hosts are white ash (Fraxinus americana) and blueberry 
(Vaccinium). 
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Sphinx chersis  WO, Northern Ash Sphinx, Great Ash Sphinx:
Soft dark gray to blue-gray with  series of black dashes, one of which reaches  wing tip. 
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Sphinx drupiferarum
 WO, the Wild Cherry Sphinx: Forewings, long and slender, are held close to the body when the 
moth is at rest. We have them on P.E.I., but I do not see them nearly as frequently
as I see the other Sphingidae. |   
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Sphinx kalmiae 
WO, the Laurel Sphinx:
The lower forewings are predominantly brownish-yellow with a fairly 
wide dark bar along the inner margin. At rest the wings hug the body, 
giving the moth a long slender look.
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Sphinx luscitiosa  
 WO, 
the Canadian Sphinx or 
Clemen's Sphinx:
 The upperside of the forewing is yellowish gray in males and pale 
gray with a faint yellow tint in females. It seems to be an uncommon 
species. |   
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Sphinx poecila  WO,  Poecila Sphinx:
If you have blueberries in fields/woods, then you probably have poecila.
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Smerinthini Tribe:
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Amorpha juglandis  WO,  Walnut Sphinx:
Highly variable; sometimes wings may be all one color or may have several colors, ranging from pale to 
dark brown, and may have  white or pink tinge. See file for different female. |   
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Pachysphinx modesta
 WO,  Modest Sphinx, Poplar Sphinx:
This moth has a large, heavy body, and females can be remarkably plump. 
They are common on Prince Edward Island. |   
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Paonias astylus  WO,  Huckleberry Sphinx:
It is recorded for northeastern Massachusetts and western Connecticut, and makes its way into southern Maine. 
It would be more common in more southerly locales.
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Paonias excaecata  WO,  Blinded Sphinx:
Named for  dull grey-blue spot in  hindwing. Widely distributedion, probably common.
I regularly see them on Prince Edward Island, and they are reported as far south as Florida. |   
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Paonias myops WO, Small-eyed Sphinx:
Named for small eye-spot in hindwing, this moth has a wide 
distribution, probably present. I regularly see them on Prince Edward Island,  reported 
as far south as Florida.
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Smerinthus cerisyi  WO,  Cerisyi's Sphinx:
Probably flies throughout Maine.
The light-coloured, forewing, apical arc does not reach the outer margin in its lower half. 
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Smerinthus jamaicensis WO, Twin-spotted Sphinx:
This moth is widely distributed and fairly common. 
Near the right forewing apex there is  complete light coloured arc (letter "c") reaching outer margin.
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Macroglossinae subfamily 
Dilophonotini tribe:
 See Hemaris comparison to help distinguish the next three species.
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Hemaris thysbe, WO,  Hummingbird Clearwing:
Not difficult to see why many gardeners mistake Hemaris thysbe  for  small hummingbird as it hovers, 
sipping nectar from flowers through  long feeding tube.
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Hemaris diffinis WO, Snowberry Clearwing:
Adults mimic bumblebees, quite variable. Wings basically clear,  dark brown to 
brownish-orange veins, bases, edges. Thorax  golden-brown to 
dark greenish-brown. Abdomen: dark (black); 1-2 yellow segments before tip. 
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Hemaris gracilis  WO, Slender Clearwing, Graceful Clearwing:
Distinguished from similar species by  pair of red-brown bands on  undersides of  thorax, which varies from 
green to yellow-green dorsally and sometimes brown with white underneath.
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 Philampelini tribe:
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Eumorpha achemon WO,  Achemon Sphinx:
Note the differences between this moth and the Pandorus Sphinx.
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Eumorpha pandorus WO, Pandorus Sphinx:
If you have Grape or Virginia Creeper nearby, then you probably have this species.
I often get asked to identify larvae from areas not previously been reported. 
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Macroglossini tribe:
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Amphion floridensis  WO. Nessus sphinx flies during day and at dusk: two bright yellow bands on tufted abdomin. At rest, 
dark red-brown upperwings hide hw red-orange median band and yellow spot. In some specimens  median band 
may be very pale or absent. Concave regions of fw outer margin also have pale yellow markings in fringe area.
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Darapsa choerilus  WO,  Azalea Sphinx:
The lower wings of this hawkmoth are a solid brownish-orange, matching the body colour.
You will often see this species listed as Darapsa pholus, especially in older literature. 
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Darapsa myron  WO,  Virginia Creeper Sphinx, Grapevine Sphinx:
FW upperside dark brown to pale yellowish gray, with olive tint (often quite green). 
 Dark rectangular patch on costal margin, although this 
may be reduced or absent. HW:  pale orange. 
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Darapsa versicolor  WO,  Hydrangea Sphinx: 
If you have hydrangea growing near a stream, then you may have the Hydrangea Sphinx. It has not been widely reported, however, and 
probably is uncommon.
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Deidamia inscriptum  WO,  Lettered Sphinx:
Fw outer margin  deeply scalloped. Light brown with dark brown markings. 
Ssmall black and white spot near  tip. The upperside of the hindwing is orange-brown with a dark brown outer margin and median line.
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Hyles gallii  WO,  Bedstraw Hawk Moth, Gallium Sphinx:
The forewing is dark brown with a slightly irregular cream-coloured transverse line. The outer margin is grey. There is a bright pink band on the hindwing.
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Hyles lineata  possible, but unlikely stray, White-lined Sphinx:
It is a strong migrator from the south, and there are records from the west and to the north. non resident stray |   
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Proserpinus flavofasciata  WO, Yellow-banded Day Sphinx:
Fw: medium to dark brown with faint to distinct white median band. Hw: dark brown 
with  wide orange median band which may not reach inner margin. Mimics bumblebee. 
Afternoon flight as  single brood from April-June in meadows in coniferous forests.  
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Sphecodina abbottii  WO, Abbott's Sphinx:
Adults  mimic bumblebees, make  buzzing sound when feeding. Wing margins scalloped. 
Fwdark brown with light brown bands and markings. Hw: yellow with a wide black outer margin.
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