248 NORTH AMERICAN TRYPETINA. 



Dingy clay-yellow, with several deep black clots upon the gray thoracic 

 dorsum and with a tumid hituberculate black scutellum ; wings with a 

 yellowish-hrown posterior angle and four very oblique yellowish-brown 

 crossbands, with oblique and very approximate crossveins and with a 

 discal cell which is gradually attenuated towards its basis. Long. corp. 

 0.28 ; long. al. 0.26—0.27. 



Syn. fTephritis quadrifasciata Macqdakt, Dipt. Exot. II, 3, p. 226. Tab. 

 XXX, f. 8. 

 Trypeta sareinata Loew, Berl. Eutom. Zeitschr., VI, p. 218, and Dipt. 

 Amer. Cent., I, 88. 



Dark clay-yellow, almost brownish-yellow. The broad head is 

 of a lighter color ; front very broad, on the anterior part of the 

 lateral margin with two bristles, and before them, near the orbit, 

 with a small black dot. Antennae yellowish, by far not reaching 

 the edge of the mouth. Face somewhat excavated, but very little 

 protruding towards the edge of the mouth, broad and with broad 

 orbits along the eyes. Cheeks rather. broad, with a small black 

 spot near the lower corner of the eye. Oral opening transversely 

 oval ; proboscis and palpi yellowish, short, entirely withdrawn in 

 the oral opening; the usual frontal bristles black; the pile on the 

 checks, below the black dot which occurs upon them, blackish ; 

 the remaining pile on the head is whitish. The upper side of the 

 thorax seems to have an almost black ground color, assumes, 

 however, in consequence of the rather thick pollen which covers 

 it, a gray, entirely opaque, appearance ; upon the middle of the 

 thorax, lengthways, there are three pairs of large, black, opaque 

 dots, the largest, anterior pair being on the transverse suture, the 

 posterior pair immediately in front of the scutellum ; upon the 

 lateral margin of the thoracic dorsum, the humeral callus, the 

 callus in front of the root of the wings, and a rather large spot 

 above the root of the wings are not clothed with pollen and rather 

 shining black. The ordinary bristles are black ; the bristles in 

 pairs, along the thoracic dorsum, are inserted upon the black 

 dots, described above, except upon the anterior pair (where they 

 may have been rubbed off in the described specimen). Scutellum 

 shining black, remarkably swollen, but with a strong coarctation 

 along the longitudinal middle line, and thus appearing bituber- 

 culate ; each of the tubercles bears a strong bristle, below which 

 a second one, much weaker, seems to have existed. Metathorax 

 and pleurae clay-yellow ; the immaculate, glabrous abdomen is 

 of the same color. Ovipositor flat, pointed, somewhat longer 



