104 LIST OF DIPTERA. 



Male. Body slender, nearly linear, cylindrical. Head trans- 

 verse, nearly as broad as the thorax ; vertex narrow. Eyes large, 

 with small facets, deeply notched, and including a smooth space on 

 each side by the base of the antennae. Ocelli approximate. Pro- 

 boscis not prominent. Palpi short. Antennae with 34 or 35 joints, 

 tapering slightly, much more than half the length of the body, deeply 

 serrated on each side ; joints transverse, very short, cyathiform, 

 petiolated. Thorax elongate-quadrate. Abdomen pubescent, with 

 eight segments, hardly tapering from the base to the tip, about twice 

 the length of the thorax. Legs rather slender, of moderate length ; 

 hinder tibiae with very minute spurs; ungues and onychia very . 

 small. Wings narrow. Mediastinal vein ending at much beyond 

 half the length of the wing. Subcostal ending at a little beyond 

 two-thirds of the length. Radial ending at very little beyond the 

 subcostal. Fore branch of the cubital nearly straight, ending at 

 about half the distance between the radial and the hind branch, 

 which ends at hardly behind the tip of the wing. Four externo- 

 medial veins, the third and the fourth united near the border. 

 Subanal united to the anal on the border. Median veinlet short. 

 Discal areolet pentagonal, about thrice longer than broad ; the one 

 basal and the two apical sides short, the intermediate sides long, 

 parallel, slightly curved. Halteres short. 



1. Kachicerus pulvicollis. 



Mas. Niger ; thorax fulvus ; alee sublimpidce : halteres et pedes 

 testacei. 



Rachicerus fulvicollis, Holiday, Cat. of Diptera, Pt. 1, 124. 



Male. Black. Eyes red, each enclosing a black compartment. 

 Thorax tawny. Wings nearly limpid; veins blackish. Halteres 

 and legs testaceous. Length of the body 2f lines ; of the wings 5 

 lines. 



Genus 2. XYLOPHAGUS. 



Proboscis brevis. Palpi sat longi. Antennae 10-articulatae, 

 sublineares, capite paullo longiores ; articulus lus sat longus ; 2us 

 et sequentes breves. Abdomen foeminae elongatum, attenuatum. 

 Pedes longi, graciles. 



Xylophagus, Meir/. ; Fabr. ; Latr. ; Macq. ; Zett. ; Westw. 

 Asilus, p., Sahlberg. 

 Empis, p., Panz. 



