380 Annals of the Carnegie Museum. 



Mesonotum and scutellum reddish, slightly shining. Legs and halteres 

 yellow. Abdomen yellow, with dorsal black spots in three longitu- 

 dinal series, confluent on third segment, the dorsal lateral margins 

 broadly bordered with black from third segment to apex. Wings 

 almost hyaline without spots; second vein almost straight at apex. 

 Length slightly over 2 mm. 



Description: Head with front, vertex, and basal joints of antennae yellow; the 

 color of the fronto-orbital stripes not differentiated (in the specimen) from that of 

 the front; the ocellar spot black, grayish pollinose; third antenna! joint and the face, 

 which is not carinate, pale yellow, with a whitish gray pollen ; front about one-fourth, 

 or slightly more, as wide as head, of equal width throughout and with the face; third 

 antennal joint hardly longer than wide, about the length of the two basal joints 

 together; arista yellow at base, the remainder together with the rays blackish, five 

 above and three below, alike in both antennae; occiput with lower half yellow, the 

 upper half, which is concave blackish, with the orbits narrowly, and a large spot at 

 vertex, yellow; cheeks exceedingly narrow; palpi yellow, not projecting. 



Mesonotum and the gently convex scutellum brownish yellow, slightly shining, 

 the former with the minute setulse blackish brown, in certain lights yellowish; 

 metanotum honey-yellow; humeri and pleura pale yellowish. Legs pale yellow 

 with the knees and last tarsal joint almost imperceptibly honey-yellow; tibiae with 

 a minute pre-apical bristle. Halteres yellow. 



Abdomen brownish yellow, with the minute first and the second segments uni- 

 colorous; third, fourth, and fifth dorsal segments, each with three transversely 

 placed black spots, resting on the apical margins; on the third segment the spots are 

 large, coalescent on apical third, and covering the greatest portion of the segment as 

 viewed from above; the median spot rectangular, reaching from base to apex, the 

 two side-spots convex anteriorly and not quite reaching the base of the segment (the 

 left side-spot lightly reaches following the apex of second segment); through the 

 convexity of these two side-spots a yellow triangular enclosure is formed on each side 

 at base of the median rectangular spot; fourth segment has the median spot almost 

 rectangular, reaching the extreme base of the segment, and on each side of it and 

 widely separated from it a rounded spot, not quite reaching the middle of the seg- 

 ment; the black marks of the third segment together with the median spot of the 

 fourth form the shape of a Maltese cross; fifth segment with the three spots of about 

 equal size, the median longitudinally oblong, all reaching scarely midway towards 

 the base of the segment; besides these spots seen from above, the lateral margins 

 of dorsal segments four, five, and six are broadly bordered with black, which forms 

 an uninterrupted band from apex of third segment; on fourth segment this band is 

 acutely widened to the apex of the segment, and on fifth segment this band is nar- 

 rowly separated from the dorsal side-spots. (Abdomen, including the black marks, 

 slightly shining in the specimen.) 



Wings somewhat yellowish hyaline, with merely a trace of grayish on costa and 

 at extreme bases of marginal and submarginal cells. The third vein ends in the 

 slightly pointed apex of the wing; the second vein is very slightly curved at apex; 

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



