312 Catalogue of North American Sphinges. 



5. ^. exitiosa. Say. 



Steel-blue ; male with the wings transparent, the margins and 

 fringes, and a band beyond the middle of the first pair steel-blue; 

 palpi, collar, edges of the shoulder-covers and of the abdominal 

 segments, two bands on the tibiae including the spurs, anterior 

 tarsi, and lateral edges of the wedge-shaped tail pale yellow ; 

 female with the fore-wings opaque ; the hind-wings transparent, 

 with a broad opaque front-margin and the fringe purple-black ; 

 antennae, palpi, legs, and abdomen steel-blue, the latter encircled 

 in the middle by a broad saffron-colored band. Male expands 

 from nine to thirteen lines ; female from fifteen to seventeen lines. 

 Larva inhabits the trunks and roots of the peach and cherry 

 trees, beneath the bark. 



The larva is the well-known peach-tree borer, which annually 

 injures to a great extent or destroys numbers of these trees. For 

 the means of preventing its ravages, see Say's Entomology, Vol. 

 II, and my communication in the New England Farmer, Vol. V, 

 p. 33. The insects above described, though very dissimilar, are 

 really the sexes of one species. I have raised many of them from 

 the larva;, and have also repeatedly captured them, in connection, 

 on the trimks of peach and cherry trees. 



6. jE. fulvipcs. H. (Catalogue.) 



Blue-black ; wings transparent, margin and fringes, and a trans- 

 verse band beyond the middle of the first pair blue-black ; anten- 

 na black, yellowish at the end ; palpi beneath, a spot on the tho- 

 rax under the origin of the wings, intermediate and liindmnst 

 tibisR, all the tarsi, and the basal half of the underside of the ab- 

 domen orange-colored ; hindmost tibiae somewhat thickened by a 

 covering of tawny hairs. Expands thirteen lines. 



7. ^. Tipidiformis. L. 



Blue-black; wings transparent, with the margin and fringes 

 blackish ; the first i)air with a transverse bine-black band beyond 

 the middle, and a broad one at tip streaked with copper-color ; 

 antenniE black ; palpi beneath, collar, upper edges of the shoulder- 

 covers, a spot on each side of the breast, three narrow rings on 

 the abdomen, ends of the tibiae and the spurs pale golden yellow ; 

 tail fan-shaped, blue-black. The male has an additional trans- 

 verse yellow line between the second and third abdominal bands. 

 Expands from seven and a half to nine inches. Larva lives in 

 the pith of the currant-bush. 



