Sphinginae subfamily
 Sphingini tribe:
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Ceratomia amyntor
 WO, 
the Elm Sphinx or Four-horned Sphinx 
Caterpillars show both brown and green forms and are unmistakeable
due to four horns on the thorax (near the head).
Larvae feed on Elm (Ulmus), birch (Betula), basswood (Tilia), and 
cherry (Prunus).  |   
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Note the pinkish-orange tail, spiracles outlined in red and the cream
stripes on the head. The dramatic color change from the dorsal 
yellow-green to the lateral light greyish-blue is not always
as intense as in this image.
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This caterpillar is also without the anal horn and feeds on pines. 
The long stripes and reddish brown afford great camouflage.
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Sphinx canadensis 
 USGS, 
Sphinx canadensis, the Canadian Sphinx.
This species is not common at lights, and is not 
often reported anywhere,
but is present in Kennebec County. 
Larval host may be exclusively black ash (Fraxinus nigra).
Variable appearance but always with granulous horn.
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Sphinx chersis 
 WO, 
the Northern Ash Sphinx or Great Ash Sphinx
Note pale blue horn and the creamy-white stripes on head.
The yellow form has a red horn.
Larval hosts are ash, lilac, privet, cherry and quaking aspen. 
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Larvae hide in the day and feed primarily on cherry, plum, and apple 
at night. Larvae have been found on Amelanchier nantuckensis
 in Massachusetts and have been reared to pupation in Michigan on 
Prunus serotina. Note purple oblique lines.
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In the final instar, the black on the head, lateral lines, horn and on abdominal 
legs is diagnostic. Larvae feed primarily on lilac and fringe.
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Sphinx luscitiosa  
 WO, 
the Canadian Sphinx or 
Clemen's Sphinx 
 This one is reported from Richmond and from northeastern New 
Jersey into southern Canada.
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If you have blueberries in the woods, then you probably have the 
Poecila Sphinx.  
The green form is more common.
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Smerinthini Tribe:
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Amorpha juglandis larvae feed upon Walnut and butternut (Juglans),
 hickory (Carya), alder (Alnus), beech (Fagus), 
hazelnut (Corylus), and hop-hornbeam (Ostrya).
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Pachysphinx modesta
 WO,  
the Modest Sphinx or Poplar Sphinx  
This moth is not officially recorded in Kennebec County. It is fond 
of poplars and 
willows and is most likely present.
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 It would be more common 
to the  south and is a relatively uncommon species.  
Only rarely are they seen in Maine. Blueberry and huckleberry (Vaccinium), cherries (Prunus) and 
willows (Salix) are  favorite larval foodplants.
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Larvae accept willows, birches, and cherries. 
I have also found them in the wild on oak in eastern Canada.
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Wild cherry species are the favorites as larval foodplants, but eggs 
will also be deposited on birches and other forest trees. 
There are varying degrees in the amount of red markings along the sides. 
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Larvae feed upon many forest trees including birches and cherries, 
but are expecially fond of poplars and willows. Red markings on sides
vary greatly from specimen to specimen.
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Smerinthus cerisyi 
WO, 
Cerisy's Sphinx;
Cerisyi larvae greatly resemble modesta larvae, both being pale 
green, with granular skin, pale lateral diagonal lines, faint red 
spiracular circles, and very pale longitudinal lines running from the 
head to a more pronounced anal diagonal line.
Larvae have green heads bounded dorsally with a pale yellow 
inverted "V".
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Macroglossinae subfamily 
Dilophonotini tribe:
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Hemaris thysbe
 WO, the Hummingbird Clearwing 
There is also an orangey-pink prepupal form. The lateral line runs 
from S1 to the blue horn. 
Hemaris thysbe larvae feed on viburnum and related plants. 
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Hemaris diffinis
 WO,  the 
Snowberry Clearwing or Bumblebee Moth  
Larval host plants include Snowberry (Symphoricarpos), 
honeysuckle (Lonicera), Coralberry, viburnums, Blue Dogbane 
(Apocynum) and dwarf bush honeysuckle (Diervilla lonicera).
Horn is black with a yellow base.
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Hemaris gracilis WO,  the 
Slender Clearwing or Graceful Clearwing   
Hemaris gracilis is distinguished from similar species by a pair of 
red-brown bands on the undersides of the thorax, which varies from 
green to yellow-green dorsally and sometimes brown with white 
underneath. They have a red abdomen. unlikely
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 Macroglossini tribe:
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In additon to Virginia creeper larvae accept Grape (Vitis), 
ampelopsis (Ampelopsis), and cayenne pepper (Capsicum).
 Larvae are green until the final instar.
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Larvae feed on Azalea and Viburnum and progress very rapidly. The 
larva to the left on Viburnum cassinoides is getting ready to 
pupate. Color change from green to light burgundy-brown indicates 
pupation is imminent.  
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Hyles gallii 
 WO, the Bedstraw Hawk Moth 
or Gallium Sphinx 
Larvae come in black and in brown forms and often feed on
Epilobium (fireweed).
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Proserpinus flavosfasciata 
 WO, 
Yellow-banded Day Sphinx:
Penultimate instar is pale green with  pair of pale, dorsolateral lines running from head to base of short caudal horn. 
Last instar is brown-black with numerous black dots; caudal horn replaced by a black button surrounded by whitish band edged with black.
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