THE BAT TICKS. 



(Family Nycteribiidce.) 



These are also wingless, degraded, parasitic flies, which have 

 a similar misnomer in the vernacular, and are called bat ticks. 

 They are quite the most extraordinary of all the flies, the body 

 being small and the legs remarkably long, so that they look 



Fig. in. — Nycteribia sp. ( After Packard.) 



almost like spiders. The head is very small and the eyes may 

 be entirely lacking. They are rarely more than one-sixth of an 

 inch in length, but the long legs, which are frequently banded 

 with jet black and silvery white, render them quite conspicuous. 



190 



