455 



siderably increased for auy extended period during February and 

 March, the result would certainly prove fatal to great numbers of stock 

 on adjacent ranches. At the very season wheu the gnats are the most 

 abundant, the so-called Heel Fly, Hypoderma Uneata, drives the stock 

 from the mountain sides and caiious to the streams, if any such are 

 near, for proteciiou; and, while under existing conditions they only 

 encounter a few gnats, a greater number caused by other conditions 

 would result in their destruction. Even now the attacks of these Sim- 

 ulia must cause stock no little annoyance, but there are few if any 

 cases of fatal results, and whatever tendency gnats may have to "run" 

 stock is placed to the credit of Heel Flies. 



AN ENCYRTID WITH SIX-BRANCHED ANTENNA. 



By William H. Ashmkad. 



Species in the group Encyrthim with branched antenu*, until quite 

 recently, were considered anomalous and unique, the first to be discov- 

 ered in this country being my Tetracnernusjforidanus, described as early 

 as 1885.* Since then, however, Mr. Howard has added one new genus 



Fig. 35. — Hexacladia sinithii, male, with female antenna above — greatly enlarged (original.) 



and species — Tanaostigma coursetice, from ^fexico, and he now informs 

 me he has several new species, representing types of new genera, in 

 the Department collection, which he proposes to describe shortlj' in a 

 synopsis. 



* Proc. Eat. Sec. Acad. N. Sc. Phil., 1885, p. sviii. 



