218 EN TOMOLOGY 
they rest (Fig. 241), with their conspicuous and usually showy 
hind wings concealed under the protectively colored front 
wings. The caterpillars of Basilarchia archippus and Pa- 
pilio thoas, as well as other larve and not a few moths, 
resemble closely the excrements of birds. Numerous grass- 
Fic. 241. 
Catocala lacrymosa; A, upper surface; B, with wings closed, and resting on bark. 
Reduced. 
eating caterpillars are striped with green, as is also a sphingid 
species (Ellema harris) that lives among pine needles. The 
large green sphinx caterpillars perhaps owe their inconspicu- 
ousness partly to their oblique lateral stripes, which cut a mass 
of green into smaller areas. The caterpillar of Schizura 
ipomee (Fig. 242), which is green with brown patches, rests 
