22 The Ohio Journal of Science [Vol. XVII, No. 1, 



Erax auripilus n. sp. A medium sized species characterized 

 by abundance of rather bright yellow hair on all 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 wing; 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 

 silver white, hypopygium of medium size, shining black in ground color 

 and clothed with yellow hair. 



Type 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. 



Erax canus n. sp. 



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 wing, 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. 



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

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

 positor shining black, slightly longer than abdominal segments six and 

 seven combined. 



Male type from Claremont, California, sent in by Carl F. 

 Baker; females from the same locality. The smallest female 

 measures only 17 millimeters in total length. 



