STREBIJD^. 385 



sively parasitic upon bats. Their breeding habits are 

 not well known. Kolenati believed them to be oviparous, 

 but Speiser is of the opinion that their breeding habits are 

 not unlike those of the Hippoboscidse. 



TABLE OF GENERA. 



1. Wings functional, with six longitudinal and nearly parallel veins 



and three outer cross-veins. ...... 2 



Wings vestigial or wanting, not functional. .... 3 



2. Thorax distinctly longer than broad; abdomen distinctly segment- 



ated, with two large proximal and three small distal segments; 

 last tarsal joint not remarkably thickened (5). Strebla. 



Thorax rounded, but little or not at all longer than broad; abdomen 

 usually indistinctly segmentated; last tarsal joint thickened 

 and elongate (4). Trichobius. 



3. Legs of usual length (3) . .... Aspidoptera. 

 Hind legs greatly elongated, twice the length of the body (Pterel- 



lipsis} (fig. 161). Megistopoda. 



