XLVI. Family DIOPSIDjE. 



Fig. 124. Sphyracephala brevicornis, enlarged. 



Small, bare species. Head prolonged into a lateral pro- 

 cess on each side bearing the eye; front bristly on the 

 upper part only; no vibrissas on the border of the mouth. 

 Front femora thickened. Auxiliary vein much approx- 

 imated to the first longitudinal vein; discal and second 

 basal cells confluent. 



But a single species of this family, Sphyracephala brev- 

 icornis Say, is known from North America, and it will 

 be easily enough recognized by the singular eye-stalks. 

 The habits, whether of the adults or larvae, are not 

 known, nor are they known of any other member of the 

 family, so far as I am aware. 



314 



