1919] Hine: Genus Erax 145 



and seven silver white, but without long hair, hypopygium black with 

 short white hair, somewhat notched at the apex with the lower part 

 extending into a prominence. Figure 40. 



Female abdomen gray pollinose, oviduct shining black, four milli- 

 meters in length. 



Taken by J. R. Watson near Albuquerque, New Mexico. 

 More than a dozen specimens from other localities in New 

 Mexico and western Texas. 



Erax auripilus Hine. 



A medium sized species characterized by abundance of rather bright 

 yellow hair on all the parts of the body. 



Male. Total length 22 millimeters. All the hairs on the various 

 parts of the head yellow, sternum and sides of the thorax with yellow 

 hair, dorsum with black hair, wings clear hyaline, furcation of the third 

 vein distinctly before the base of the second posterior cell and with a 

 long appendage, costa not enlarged near the tip of the auxiliary vein, 

 posterior branch of the third vein meets the costa distinctly before the 

 tip of the wings; legs with yellow hair and black bristles, in most part 

 black in ground color, but the basal half or more of each tibia is bright 

 yellow; abdomen with yellow hair, segments two to five black above 

 with light colored lateral and hind margins, segments six and seven 

 silvery white, hypopygium of medium size, shining black in ground 

 color and clothed with yellow hair. Figure 47. 



One male, taken at Clifton, Texas, May 29, 1907, by E. B. 

 Williamson. A male in the collection of the Academy of 

 Natural Sciences was taken at Round Mountain, Texas. 

 Several females in the U. S. National Museum from different 

 localities in Texas. 



Erax canus Hine. 



Male. Total length 24 millimeters. General body color rather 

 hoary white produced by white pollen and hair, dorsum of the thorax 

 with black hair and bristles, legs with black bristles, mystax and beard 

 pale yellow, bristles of the front black, palpi black with pale yellow hair 

 and bristles, wings hyaline, costa uniform throughout, furcation of the 

 third vein distinctly before the base of the second posterior cell and 

 with a distinct appendage, the posterior branch of the third vein bends 

 forward to meet the costa plainly before the apex of the wings, legs 

 black with the basal third of each tibia reddish; abdomen uniformly 

 hoary white, segments two, three and four on the dorsum with long white 

 hair parted at the middle and directed outward ; hypopygium of medium 

 size, black and clothed with white hair. Figure .S8. 



Female colored like the male, but abdominal segments two, three 

 and four devoid of the peculiar long hair described for the male. Oviduct 

 shining black, slightly longer than abdominal segments six and seven 

 combined. 



