SECOND REPORT OF THE STATE ENTOMOLOGIST. 



nized by the peculiar pattern of its wings, by the white spot behind the 

 thorax (the scutellum), and the white bands of the abdomen. With its 

 wings expanded, it measures across them about one-fifth of an inch. 

 They are "whitish, glassy, banded with dusky, somewhat in the form of 

 the letters I F — the I placed next the base of the wings, and its lower 

 end uniting rather indistinctly with the lower end of the F ; the base 

 and the extreme tip of the wing being always glassy" (Walsh), 



Fig. 26, c, after Comstock, represents the male fly,* The following 

 more particular description is abridged from Dr. Loevv's Review of the 

 North American Trypclina: The color is brownish-black. The head 



is pale yellowish with a narrow 

 dark yellow front, and yellow an- 

 tennae. The thorax shows four 

 rather narrow longitudinal stripes 

 of whitish pollen, arranged in pairs 

 and confluent anteriorly. The 

 scutellum is white, with black upon 

 the sides and base. The first four 

 segments of the abdomen are 

 broadly banded behind with white 

 pollen — the last segment is with- 

 out the band. The ovipositor of 

 the female is black, broad, trun- 

 cate, about once and a half the length of the last segment. The legs are 

 mainly clay-yellow, thus : posterior femora black with a clay-yellow tip; 

 front femora clay-yellow with a large, broad brownish-black stripe tipon 

 the hind side ; tibi^ and tarsi clay-yellowish. The Avings are hyaline, 

 with four black crossbands, the first of which lies near the base ; the last 

 three are connected near the anterior margin and divergent toward 

 the posterior one. Length of body, 0,17 in,; with the ovipositor, 0.19 

 in.; length of wing, 0,17 in. 



Life-History. 



The life-history, of this species is briefly this : The fly may be seen 

 about apple trees in July. During the latter part of the month, or in 

 August, it deposits several of its eggs upon an apple near the calyx end, 

 where the fruit may have been already burrowed by the apple-worm of 

 the codling-moth, Carpocapaa pomonella. According to Mr. Walsh, the 

 eggs are inserted by the ovipositor of the fly within the flesh of the ap- 



*The figure fails to represent correctly the one from which it was taken. From the 

 reduced photograph furnished the printer for a wood-cut, a pen and ink sketch was 

 made and photographed, in which ])roportions have been changed, veins and other features 

 omitted, and additions made. Figs. 21 and '^5 and some otliers need the same explanation. 



Fig. 26. — Trtpeta poMonella : a. the larva ; h, 

 the puparium ; c, the fly. (After Comstock) 



