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Insects
The Little Belt Mountains have a rich and diverse insect fauna. The lists below are for
some of the more common and easily identified insects found in the lower end of Paine Gulch--a Research
Natural Area in the Lewis & Clark National Forest one mile south of Monarch.
Butterflies

To see photos of the butterflies, visit the
Butterflies of Montana website
of the U.S. Geological Survey or use the Image Search Engine
at Google and search for the common name or the genus and species.
| Common Name |
Family |
Genus |
Species |
| Pink-Edged Sulphur |
Sulphurs |
Colias |
interior |
| Western Tiger Swallowtail |
Swallowtail |
Papilio |
rufulus |
| Eastern Tiger Swallowtail |
Swallowtail |
Papilio |
glaucus |
| Two-Tailed Swallowtail |
Swallowtail |
Papilio |
multicaudata |
| Great Spangled Fritillary |
Fritillary |
Speyeria |
cybele |
| Comma |
Angle Wings |
Polygonia |
comma |
| Mourning Cloak |
Tortoise Shells |
Nymphalis |
antiopa |
| Weidemeyer's Admiral |
Admirals |
Limenitis |
weidemeyerii |
| Common Blue |
Blues |
Celastrina |
argiolus pseudoargiolus |
| Gillette's Checkerspot |
Checkerspots |
Euphydryas |
gillettii |
Moths
To see photos of the moths, visit the Macro Moths of the Pacific Northwest and the Moths of Montana websites of the U.S. Geological Survey or use the Image
Search Engine at Google and search for the common name or the genus
and species.
| Common Name |
Family |
Genus |
Species |
| Big Poplar Sphinx |
Sphinx |
Pachysphinx |
modesta |
| Cerisy's Sphinx |
Sphinx |
Smerinthus |
cerisyi |
| Small-Eyed Sphinx |
Sphinx |
Paonias |
myops |
| Twin-Spotted Sphinx |
Sphinx |
Smerinthus |
germinatus |
| White-Lined Sphinx |
Sphinx |
Hyles |
lineata |
| Galium Sphinx |
Sphinx |
Hyles |
gallii |
| Glover's Silk Moth |
Giant Silk |
Hyalophora |
gloveri |
| Polyphemus Moth |
Giant Silk |
Antheraea |
polyphemus |
| Garden Tiger Moth |
Tiger |
Arctia |
caja |
| Fall Webworm |
Tiger |
Hyphantria |
cunea |
| White Underwing |
Underwing |
Catocala |
relicta |
Ants

The work of disintegrating and
decomposing fallen trees in the forest is greatly
accelerated by ants. The most effective are
the large, all-black carpenter ants. Wood ants
are red and black and squirt a stream of formic acid
when disturbed. When you crush one between the
fingers there is a distinct vinegar-like smell.
The small red ants are all red in color.
| Common Name |
Family |
Genus |
Species |
| Wood Ant |
Formica |
Formica |
ravida |
| Carpenter Ant |
Formica |
Camponotus |
laevigatus |
| Red Ant |
|
|
|
Flies
| Common Name |
Family |
Genus |
Species |
Comments |
| Horse Fly |
Horse Flies |
Hybomitra |
osburni |
viscous biter |
| Horse Fly |
Horse Flies |
Hybomitra |
rupestris |
viscous biter |
| Deer Fly |
Horse Flies |
Chrysops |
fulvaster |
viscous biter |
| Snipe Fly |
Snipe Flies |
Symphoromyia |
montana |
viscous biter |
| Mosquito |
Mosquitoes |
Aedes |
vexans |
viscous biter |
| Mosquito |
Mosquitoes |
Aedes |
dorsalis |
viscous biter |
| Blue Bottle Fly |
Blow Flies |
Calliphoria |
vomitoria |
dung fly |
Bugs
| Common Name |
Family |
Genus |
Species |
Comments |
| Leaf-Footed Bug |
Bugs |
Acanthocephala |
terminalis |
foul odor |
Grasshoppers
| Common Name |
Family |
Genus |
Species |
Comments |
| Two-stripe grasshopper |
Spurthroated grasshoppers |
Melanoplus |
bivivattus |
very common, large |
| Dawson's spurthroated grasshopper |
Spurthroated grasshoppers |
Melanoplus |
dawsoni |
|
| Crenulated grasshopper |
Stridulating slantfaced grasshoppers |
Cordillacris |
crenulata |
|
| Speckle-winged grasshopper |
Band-winged grasshoppers |
Arphia |
conspersa |
loud, crackling sound |
Links to Other Websites
Photo of
carpenter ant from Kansas Dept. of Agriculture
Photo of
Aedes vexans mosquito from Cirrus Digital Imaging
Photo of
fall webworm larvae from Kansas Dept. of Agriculture
Photo of
snipe fly from
Alex Wild
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