JAMES S. MINE 
299 
interruption on mid-dorsal line, very narrow hind margin of sixth segment and 
basal three-fourths of the seventh in the female or all of the seventh in the 
male. These silyery markings have a tendency to vary somewhat but the 
ones mentioned are fairly constant. In some of the males before me, however, 
the venter of the abdomen is quite largely silvery. ’ 
The structure of the female suggests Asilus very much, but the male has 
genitalia quite like males of the genus Erax. The oviduct in the female is 
conical much as in Asilus sericem. 
TRANS. AM. ENT. SOC., XLIII, 
