140 LEPIDOPTERA OF NORTH AMERICA. 



T. exitiosa Say. Figured in Say, Amer. Ent. VII, pi. 19. 



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 tibite 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 t-lie fringe purple-black ; 

 antennaj, 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, Yol. 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 larvas, and have also repeatedly captured them, 

 in connection, on the trunks of peach and cherry trees. 



Haekis. 



T. fulvipes Uarris. 



Blue black. Wings transparent; margin and fringes, and a 

 transverse band beyond the middle of the first pair blue-black ; 

 antennae black, yellowish at the end ; palpi beneath, a spot on the 

 thorax under the origin of the wings, intermediate and hindmost 

 tibiae, all the tarsi, and the basal half of the under side of the 

 abdomen orange colored; hindmost tibiae somewhat thickened by 

 a covering of tawny hairs. Expands thirteen lines. 



Harris. 



T. tipuliformis Uarris. 



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 color; 

 antennae 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 transverse 

 yellow line between the second and third abdominal bands. Ex- 



