312 Catalogue of North American Sphinges. 
5. AZ. 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 tibie including the spurs, anterior 
tarsi, and lateral edges of the wedge-shaped tail pale yellow; 
Semale with the fore-wings opaque ; the hind-wings transparent, 
with a broad opaque front-margin and the fringe purple-black ; 
antenne, 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 larve, and have also repeatedly captured them, in connection, 
on the trunks of peach and cherry trees. 
6. 4. fulvipes. H. (Catalogue. ) 
Blue-black ; wings transparent, margin and fringes, and a trans- 
verse band beyond the middle of the first pair blue-black ; ante 
ne black, yellowish at the end ; palpi beneath, a spot on the tho- 
rax under the origin of the wings, intermediate and hindmost’ 
tibie, all the tarsi, and the basal half of the underside of the ab- 
domen orange-colored ; hindmost tibie somewhat thickened by 4 
covering of tawny hairs. Expands thirteen lines. 
7. Al. Tipuliformis. 1. 
Blue-black ; wings transparent, with the margin and fringes 
blackish ; the first pair with a transverse blue-black band beyond 
the middle, and a broad one at tip streaked with copper-colot j 
antenne black ; palpi beneath, collar, upper edges of the shoulder- 
covers, a spot on each side of the breast, three narrow rings sen 
the abdomen, ends of the tibie 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 mu 
the pith of the currant-bush. 
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