ANEPSIUS — ARGYRA. 123 



Female. Face broader than that of the male, with a more 

 developed transverse swelling', and covered with dust of much more 

 gray color. Palpi much smaller than those of the male, only 

 about half as large, blackish with yellow-grayish dust, and with a 

 considerable covering of pale brown hair, which in another direc- 

 tion appears to be entirely black. The sixth segment of the ab- 

 domen, although very short, still distinctly perceptible. The hairs 

 on the anterior side of the fore coxae longer and coarser, yellowish. 

 Tibiae and tarsi simple and with the usual short hairs ; the joints 

 of the fore tarsi gradually diminishing in length. The wings 

 usually a little duller than those of the male. 



Hab, New York. (Osten-Sacken.) 



Gen. XIII. ANEPSIUS. 



The genus Anepsius shows the closest relation to the genus 

 Systenus, from which it differs only by the structure of the first 

 joint of the antennas. Its characters are the following : The first 

 joint of the antennas hairy on the upper side, the second transverse, 

 the third rather large ; the arista inserted on its upper side, quite 

 near the basis. The abdomen of the male appears compressed 

 from the side. Hypopygium short, not entirely imbedded ; its 

 outer appendages very small. The first joint of the hind tarsi 

 without bristles. Wings not enlarged towards their basis ; the 

 last segment of the fourth longitudinal vein not inflected and 

 parallel to the third vein. 



The name of the genus (from wt^tot, cousin) has reference to 

 its intimate relationship with Systenus. 



No species of Anepsius has yet been found besides those know r n 

 from Europe. 



Gen. XIV. ARGYRA. 



The species of Argyra are easily distinguished by the dense 

 silvery-white dust, which almost in all the species covers head 

 and abdomen, in many also thorax and scutcllum. The majority 

 of the species of the genus Leucostola resemble in this respect 

 those of Argyra, and differ from them only by the first joint of the 

 antennas of the former being entirely bare, while in the species of 

 Argyra it is covered with hair on the upper side. The following 

 are the most important characters of the genus Argyra : Second 



