240 DIPTERA. 



Family XXXVIII. — Nycferibiidte. 



Head very small ; antennae very short, two-jointed ; wings 

 absent ; legs very long. 



The Nycterihiidoi are all parasitic on bats ; they are of a brown 

 or yellowish colour, and the largest species do not exceed one-sixth 

 of an inch in length. 



They are much more spider-like in their appearance than the 

 Hipjjoboscidce. Kolenati states that they possess eyes and two 

 ocelli ; but Schiner was unable to detect them in two species 

 which he examined ; possibly they are present in some species 

 and absent in others. 



