1895.] NATURAL SCIENCES OF PHILADELPHIA. 307 



two below the large quadrate spot of the marginal cell, and one at 

 the end of the second longitudinal vein; first posterior cell with four, 

 one at the posterior cross vein, two smaller ones midway between the 

 first and the large one at the tips of the wing, the latter occupying 

 the entire width of the cell; second posterior cell with four occupy- 

 ing the central portion, the larger ones coalescent ; third posterior 

 cell with three spots, the large middle one triangular; discal cell 

 with two, the outer one three or four times the size of the others. 

 One specimen, Drayton Island, May 9, 1894. 



DESCRIPTIONS OF NEW GENERA AND SPECIES. 

 BY D. W. COQUILLETT. 



Platyura elegans n. sp., $ 9 . 



Head black, lower part of front and the face yellow; antennse 

 black, the two basal joints yellow; proboscis yellow, its apex and 

 the palpi black. Dorsum of thorax opaque brownish black, the 

 sides, pleura and scutellum, yellow; metanotum brown, this color 

 extending upon the pleura to the middle coxre. Abdomen shining 

 brownish- black, the first segment, both ends of the second, apices of 

 the third and fourth, and the whole of the fifth, yellow; first five 

 ventral segments also yellow. Halteres and legs yellow, tibia? desti- 

 tute of bristles. Wings grayish hyaline, marked with two irregular 

 brown crossbands and with two brown spots; the first band begins at 

 the first vein before its tip, is interrupted between the branches of 

 the fifth vein, and stops before reaching the hind margin of the wing, 

 its posterior portion scarcely half as wide as the costal part; the second 

 band starts from the tip of the third vein and stops at the anterior 

 branch of the fifth a short distance before its tip, where the band is 

 scarcely one- fifth as wide as at the costa; midway between these two 

 bands is a large brown spot reaching from the anterior branch of 

 the fifth vein to the hind margin of the wing at the tip of the pos- 

 terior branch ; a brown cloud on anterior branch of third vein, this 

 branch terminating at twice its length beyond the tip of the first 

 vein. Length 3.5 mm. 



Georgetown, Florida, May 10, 1894 (C. W. Johnson); North 

 Carolina. A single specimen of each sex. 



The specimen from the latter locality is from Dr. Riley's collec- 

 tion, now in the National Museum. 

 22 



