416 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



near its iiiicklle, nearly or quite obsolete beyond the transverse cubital, 

 these two meeting very sharply; cul)ital and subdiscoidal veins of the 

 fore wing- nearly or entirel\' obsolete beyond the ends of the cells; 

 third cubital cell with almost no maro'in on the radial cell, the second 

 and third transverse cul)ital veins almost meetino- there; teguhe tinel}^, 

 sparsely punctured, )»lackish to more or less ferruginous. 



Legs.- — Black or very dark brown; anterior coxa? sericeous in front, 

 the middle and hinder ones onh^ faintly so; hind coxre silvery pu))es- 

 cent behind; coxa^ and trochanters with short hairs, most abundant on 

 the fore legs; fore femora quite hairy beneath and with a trace of a 

 silvery pubescent line in some cases; all the femora with a few small, 

 scattered punctures; tibiae and tarsi sericeous, the hind tibia' densely 

 so behind; fore metatarsus with ten short comb teeth, the tirst shorter 

 than the others; tarsi rather lighter than the other leg segments, their 

 claws ferruginous except the tips, which are black. 



3fale. — Differs from the female as follows: Abdomen more seri- 

 ceous above; cheeks about half the width of the eye; posterior half of 

 the last dorsal abdominal plate closely covered with short, brown hairs 

 pointing backward; the posterior margin of this plate evenly rounded 

 at the sides and with a shallow notch in the center; seventh ventral 

 plate quite excavate behind, with a fringe of ^^ellowish hairs along its 

 outside edge; terminal ventral plate rather narrow, with a median 

 ridge, its posterior margin rounded at the sides, wnth a somewhat 

 acuminate median projection; the abdomen as a whole black, l)ut with 

 a slight ferruginous tinge above at the base and on the first two or 

 three segments beneath; teguUe variousl}" mottled with black and 

 ,dark ferruginous. 



In some specimens the first recurrent vein of the fore wing is not 

 nearly interstitial with the second transvei'se cubital and the amount of 

 ferruginous on the abdomen of the male is quite variable. 



LengtJi. — Females, 21-24 mm.; males, 21-23 mm. 



This pretty species appears to be quite common but local in its dis- 

 tribution, as all the specimens I have seen were captured in Texas. 

 The onl}^ closer data are for two examples taken at Dallas. Cresson 

 says it is a common species taken on Solidago flowers in September 

 and October. 



It is pictured in the Insect Book on Plate XI, figs. 3 and 6 (the 

 latter being named tenanus by a misprint). 



UNIDENTIFIED SrECIES. 



I am unable to recognize the following species, which have been 

 described as having been taken within the geographical limits covered 

 in this paper, though I have in some cases ventured to guess at what 

 they may be. The name given is that under which the description 

 was published. 



