246 NORTH AMERICAN TRYPETINA. 



Honey-yellow, with a rather tumid head and small eyes ; wings hyaline, 

 with a brown picture, which consists of two crossbands, converging 

 towards the posterior margin, of a little band, between both, reaching 

 from the costa to the third longitudinal vein and of two little spots upon 

 the third and fourth longitudinal veins, which spots are connected by a 

 narrow infuscation along the margin of the wing. Long. corp. 0.19 

 0.20 ; long. al. 0.170.18. 



Honey-yellow, the head of a purer yellow, somewhat tumid. 

 Front broad, with some scattered, short, very delicate blackish 

 pile ; its lateral bristles weak. Frontal lunule very small. Eyes 

 small, elongated, with a rather projecting anterior corner. Face 

 descending straight; edge of the mouth blunt, somewhat swollen; 

 the conspicuously deepened antennal furrows become narrowed 

 below and disappear in the lateral edges of the mouth ; the part 

 of the face between them forms an acute, level triangle; the 

 cheeks are remarkably broad, beset with a few short black hairs; 

 oral opening very small ; clypeus unusually little developed ; 

 palpi short, but considerably broad, sparsely beset with short, 

 black hairs. Proboscis rather short and stout; the stout sucto- 

 rial flaps, although somewhat long, are not prolonged, nor folded 

 backwards. The upper side of the thorax, with the exception of 

 the posterior and lateral margins, which are shining, is covered 

 with a thin ochre-yellow pollen, and hence opaque; the short pile 

 upon it and the bristles are black; the number and position of 

 the latter is the usual one ; of the two pairs of bristles in front 

 of the scutellum, the anterior one is inserted upon very small 

 dots of a somewhat darker color ; in the proximity of the suture 

 thei'e are two similar dots; moreover, the trace of a slender dark 

 middle line is perceptible. Scutellum shining honey-yellow, 

 rather convex, sparsely beset with little black hairs and bearing 

 four strong black bristles. Pleurae of the same color with the 

 scutellum, beset with black pile. Abdomen, likewise, shining 

 honey-yellow, in the middle with a trace of an ochre-yellow dust, 

 beset with black pile, but without longer bristles. The yellow 

 feet have rather strong femora ; the two front femora are beset 

 with bristles upon the under and upper side. Wings hyaline, 

 with a picture which is very like that of the two preceding species. 

 The principal feature consists in two narrow brown transverse 

 bands ; the first, somewhat faded at its beginning, starts from 

 the end of the stigma and runs perpendicularly over the small 

 crossvein as far as the proximity of the posterior margin, while 



