384 Annals of the Carnegie Museum. 



third joint hardly twice as long as wide and its aiista, blackish 

 apically and yellow at base, with at least six blackish rays above and 

 four blackish ones below. The face has the grayish color of the 

 antennae and is very slightly keeled. Palpi yellow, not enlarged, or 

 projecting; ocellar spot black, with grayish pollen. Mesonotum and 

 scutellum rather light reddish brown, very lightly grayish-white 

 poUinose in certain lights, the extreme apex of the latter yellowish. 

 Pleura lighter than the mesonotum, and with the grayish-white pollen 

 more in evidence. Legs pale yellow. Halteres yellow. Abdomen 

 brownish yellow with black spots on all the dorsal segments, except 

 the small first segment; these spots are placed in longitudinal, inter- 

 rupted rows. The small first segment yellowish; the second segment 

 with a large spot on each side, but at a considerable distance from the 

 side-margin; third segment with a single spot in its middle, rectangular 

 in shape and extending from base 1o apex, fourth segment with three 

 large spots of almost equal size and larger than the spot on third seg- 

 ment, the side-spots with convex outline, the median spot almost 

 quadrate, extending the whole length of the segment and twice as wide 

 as the spot on the third segment; fifth segment with a narrow median 

 longitudinal spot and on each side of it a small round spot near the 

 apical margin; the following segments with black on each side. Be- 

 sides the spots mentioned the extreme side-margins of dorsal segments 

 four, five, etc. are broadly bordered with black, forming an uninter- 

 rupted stripe to apex of abdomen. Venter yellow. 



Wings somewhat yellowish hyaline with two light brown costal 

 spots, one transversely irom apex of first vein, the other, better de- 

 fined, in apex of marginal cell and extending across the apical portion 

 of second vein. The costa extends only to the apex of the third vein, 

 which ends in the very apex of the slightly pointed wing. Second 

 vein with a very slight curvature at apex. The distance between the 

 tips of second and third veins about two and one-third the distance 

 between the tips of the third and fourth veins, which are almost 

 parallel in their apical course. The distance between anterior and 

 posterior cross-veins about one-third longer than the first section of 

 third vein. Posterior cross-vein at right angles with fourth vein and 

 about one-third shorter than the ultimate section of fifth vein. The 

 ultimate section of fourth vein, which is very thin and pale in its apical 

 course, is not more than two and one third times the length of the 

 penultimate section. 



