92 Psyche [June 



black bristles; antennae (Fig. 4) black, third joint small, taken with 

 the second rounded in outline; arista dorsal, its first joint short, 

 second long and slender, scarcely pubescent; lateral and inferior 

 orbital cilia white. Thorax and abdomen blue green; pleurae and 

 thorax with white pollen, which is thickest on the former; abdomen 

 with the pollen thinner, when viewed obliquely with a central line 

 and the incisures black; hypopygium small, bronze-green with 

 several stout bristles at tip, its appendages scarcely visable. Coxae 

 and femora blue-green with white pollen; trochanters and tips 

 of femora yellow; all tibiae pale yellow; hind tibiae with their tips 

 black for a distance about equal to the length of their metatarsi, 

 fore tarsi blackened from the second joint and middle tarsi from 

 the tip of the first joint; fore and middle tarsi about one and a 

 fourth times as long as their tibiae; hind tarsi three fourths as long 

 as their tibiae and wholly black; fore and middle tibiae with very 

 short hairs and no bristles except one near the basal third of middle 

 pair; hind tibiae with slender bristles above; fore pulvilli not en- 

 larged. Tegulae, their cilia and the halteres pale yellow. Wings 

 grayish hyaline; veins dark brown, yellowish at the root of the 

 wings; costa rather stout from the tip of the first vein to the third 

 where it ends; third vein runs nearly straight and parallel to the 

 second until opposite the tip of that vein where it bends a little 

 backAvard reaching the costa about half way from that point to the 

 tip of the wing; the slender fourth vein bent forward then back- 

 ward near its third fourth, ending back of the apex of the wing. 



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

 August, by F. H. Snow. Type in the collection of the University 

 of Kansas. 



Since writing the above I have found among my material 

 taken at Carriso Creek, San Diego Co., Cal., two females which 

 no doubt belong to the same species as the male described above. 



Asyndetus caudatus sp nov. 

 Male: Length, 2.2 mm. Face and front green, covered with 

 white pollen which nearly conceals the ground color of the former; 

 face a little narrower than the front but rather wide; palpi rather 

 large, white; proboscis yellowish; antennae (Fig. 5) black, third 

 joint small rounded; arista dorsal; lateral and inferior orbital 

 cilia white. Thorax and abdomen dark but bright green with but 

 little pollen; hypopygium small, produced forward below into a 



