BY G. F. FERRIS. 



288 



fig. 2a) is entirely covered with minute setulae (not shown in 

 the figure) except for a narrow marginal area behind the anal 



Fig. 2. Ornithophila makilingensis Ferris. A wing (vestiture of 

 setulae not shown) ; B clypeal region. 



vein. The veins are enth'ely bare except for numerous small 

 set^ alone" the entire length of the costa. 



Genus OBNITHOCTONA Speiser. 



Hippoboscidae with functional and non-caducous wings 

 which have seven veins behind the costa and three cross veins ; 

 claws three-toothed ; first segment of the posterior tarsi with a 

 distinct transverse comb of setae on the plantar siu-face at the 

 base ; ocelli present ; antennae very large and broad, flattened, 

 nearly parallel, slightly exceeding the palpi in length. 



This is a rather large genus, containing about twenty names, 

 but almost none of the species are recognizable from the 

 existing descriptions. A number of the species are from the 

 Indian Ocean region and possibly the two here described are 

 synonyms of some of these. 



I wish here to call attention to the most distinctive character 

 of the genus, the transverse comb of setae on the plantar 

 surface of the first segment of the posterior tarsi. This is a 

 character that has not been observed previously and that is iiot 

 mentioned in any descriptions of the genus. 



