1919] Hine: Genus Erax 121 



Erax belfragei n. sp. 



Male. Total length 10 millimeters. Mystax largely black though 

 with some gray intermixed; palpi with black pile, beard gray, thorax 

 gray pollinose with the usual black markings, hair and bristles mostly 

 black, although some gray intermixed on posterior part and on the 

 scutellum. Wings slightly fumose, a little more intense toward the 

 apex, costal border not dilated in the least, stump on anterior branch 

 of the third \"ein not quite as long as the connecting vein, perhaps the 

 length of this stump will be variable however. Femora entirely black, 

 narrow apexes of tibiae and entire tarsi black. Abdomen dark, largely 

 gray pollinose, dorsum of segments two to four black before the narrow 

 posterior gray borders, segments five, six and seven silvery; genitalia 

 elongate, sides nearly parallel, widened somewhat on posterior third 

 and notched at tip. Figure 21. 



Female colored like the male, stump of anterior branch of the third 

 vein fully as long as abdominal segments four to seven inclusive. 



Type: Male and allotype bearing the label "Texas," 

 Belfrage. In the U.S. National Museum. 



Most closely related to aurimystaceus but the color and male 

 genitalia are clearly distinctive. 



Erax slossonae n. sp. 



Male. Total length 14 millimeters. Mystax prominent, mostly 

 white, but with a number of black bristles in the upper part, palpi 

 with black pile, beard white, dorsum of the mesothorax with long black 

 hair and bristles, scutellum with white hairs on its disc and a few black 

 bristles on its margin. Wings hyaline, very short, much shorter than 

 the connecting vein; legs entirely shining black, clothed with white 

 and black hair and black bristles. Abdominal segments two, ' three 

 and four black before the narrow, gra}' pollinose, hind-margins, dorsally. 

 Narrow posterior margin of four, all of five, six and seven silvery; 

 genitalia shining black, with black hair, widened from the side gradually 

 to middle, then narrowed gradually and with a rather large extension 

 apically partly cut off by incisions above and below. See Figure 25. 



Male type from Jacksonville, Florida, collected by Mrs. 

 Anna T. Slosson and forwarded by C. W. Johnson. 



Very distinct from other species of its group from Eastern 

 United States on account of its entirely shining black legs. 

 The male genitalia distinguish it readily. 



Erax aflfinis Bellardi. 



Total length 17 millimeters. Mystax black and white mixed, 

 palpi with black and white hairs and bristles, beard white, thorax 

 yellowish brown pollinose with the usual black markings; scutellum 

 white pilose with black or white marginal bristles ; legs variable to some 

 extent, femora usually black on basal three-fourths and red at apex, 



