EUTARSUS. 153 



taken together. The first joint of the hind tarsi is shorter than 

 the second and a little stouter, especially towards the tip; il Is 

 fringed with the usual short hair, which is however unusually 

 dense upon the latter part of the under side. Cilia of the black 

 margined tegulae yellowish-white. Wings short and broad; the 

 posterior transverse vein strikingly far distant from the margin 

 of the wing; the last segment of the fourth longitudinal vein he- 

 fore its middle gently inflected forward. 



Hab. District Columbia. (Osten-Sacken.) 



Observation. — A rather badly preserved female, which I pos- 

 sess, I suppose to be that of Leucostola cingulata ; it shows, how- 

 ever, some differences, so that it may belong to some other closely 

 related species. It differs from the above described male by the 

 following characters : The face is comparatively broad and covered 

 with a dense glittering silvery-white powder. The white palpi 

 are larger than those of the male. The third joint of the antennae 

 is very short ; the position of the arista almost apical. The ab- 

 domen is yellow with the exception of the last segment which is 

 of a metallic-green color, shows however, when looked upon in an 

 oblique direction, an indistinct greenish lustre; its penultimate 

 and antepenultimate incisures are greenish-black towards the lateral 

 margin. The posterior margin of the pleura? is not gray, but yellow. 

 Among the whitish hair of the fore coxa3 there are a few light- 

 brown bristles, which, in a certain direction, have a black appear- 

 ance. The tip of the hind femora is not darker and the first joint 

 of the hind tarsi is of the usual plain structure, however compara- 

 tively of the same le^th as that of the described males. Other- 

 wise it coincides with it perfectly. The only character which 

 makes it doubtful whether they belong together is the yellow color 

 on the hind margin of the pleura) in the female. 



Hab. District Columbia. (Osten-Sacken.) 



Gen. XXVII. EIT ARSIS. 



Characters. Face narrow, especially in the male ; a little 

 broader upwards. Palpi very small. The first joint of the an- 

 tennae without hair, the second much overreaching the third; the 

 third rounded ; the arista dorsal, though rather closely approxi- 

 mated to the tip of the third joint, distinctly two-jointed. The 

 elongated, cylindrical abdomen of the male consists of six seg- 



