1916] Van Duzee — The Genus Asyndetus 93 



short point and with several stout bristles at tip. Coxae and femora 

 black with green reflections; tips of coxse, trochanters and base 

 of femora yellow; tibiae yellow, the tips of the hind pair brown; 

 fore and middle tarsi about one and one fourth times as long as 

 their tibiae, infuscated from the tip of the first joint; hind tarsi 

 black, shorter than their tibiae; fore and middle tibia? without 

 bristles except a very slender one at basal third of middle pair; 

 hind tibiae with a few very small bristles. Tegulae, their cilia and 

 the halteres pale yellow. Wings hyaline, slightly tinged with gray; 

 third vein nearly straight, parallel with the second, its tip far be- 

 fore the tip of the wing; the delicate fourth vein broken, its last 

 portion somewhat forward of the basal part, but in a nearly parallel 

 line with it, ending in the apex of the wing. 



Described from one male from Bill Williams Fork, Ariz., taken 

 in August, by F. H. Snow. Type in the Kansas University col- 

 lection. 



This can be separated from latus n. sp. by its smaller size nar- 

 rower face and front, white palpi and straight third vein. 



Asyndetus johnsoni sp, nov. 



Male: Length, 2 mm. Face and front green, the latter only 

 slightly wider than the former; lower orbital cilia white and rather 

 short; antennae (Fig. 6) black, third joint large, rounded below but 

 irregular in outline above. Thorax and scutellum dark shining 

 green. Abdomen bronze green, towards the apex nearly black; 

 hypopygium black; bristles at apex of abdomen distinct but rather 

 slender. Coxae black; femora brownish black with a row of slender 

 hairs below; fore and middle tibijie yellow; fore tibiae with a row 

 of hair-like bristles extending the whole length above, these bristles 

 about as long as the thickness of the tibiae; middle tibiae with three 

 bristles on the upper front edge; hind tibite brownish black with a 

 number of small bristles above; fore and middle tarsi about as 

 long as their tibiae, infuscated from the tip of the first joint; hind 

 tarsi brown, scarcely as long as their tibiie, with rather conspicuous 

 hair. Tegulae, their cilia and the halteres yellow. Wings grayish 

 hyaline; fourth vein bent backward but not distinctly broken at 

 about the middle of the last section, ending back of the apex of the 

 wing; cross-vein a little nearer the base of the wing than the tip 

 of the first vein is. 



