2l8 



ENTOMOLOGY 



they rest (Fig. 241), with their conspicuous and usually showy 

 hind wings concealed tinder the protectively colored front 

 wings. The caterpillars of Basilarchia archippus and Pa- 

 pilio thoas, as well as other larvse and not a few moths, 

 resemble closely the excrements of birds. Numerous grass- 



FIG. 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 harrisii) 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 

 ipomcea (Fig. 242), which is green with brown patches, rests 



