THE BrrTEHFLY 



41 



having numerous round and triangular silvery spots on the 

 under side of the hind wing. 



The Spring Azures (LyciBnas ') include small satin or steel- 

 blue species which exhibit marked seasonable pcjljanorphism ; 

 the Coppers, orange-red or brown species ; and the hair-sti'eaks, 

 or Theclas,- small, brown butterflies usually with two tails to 

 the hind wing. 



The Hawk-moths (Sphingidie ■'') fly swiftlj^ and powerfully, 

 and as they hover over flowers at dusk can hardly Ije 

 distinguished from humming-birds. The larva3 have a 



Fig. 40. — Smerinthns geininatits, the twin-spotted .sphinx. Nat. size. Plioto. 

 l)y W. H. C. P. 



caudal horn or tubercle. The commonest of these are the 

 tomato or potato " worm," green in color and banded. 

 There are about one himdred species of the hawk-moths in 

 the United States. The T-\vin-spotted Sphinx (Fig. 40), so 

 called from the black spots of the hind wing, is d(\structive to 

 fruit and shade trees. The Pandorus Sphinx (Fig. 41) is of a 

 beautiful olive color ; its larva feeds on vines. 



' Lukaina, a poetic name of Venus. ^ A Greelv feminine name. 



' From Sphinx, or sphinx, a fal^led monster. The larva of this niotli as- 

 sumes an attitude like the spliin.x. 



