LIST OF DIPTERA. 105 



Mediastinal vein ending at much beyond half the length of the 

 wing. Subcostal ending a little before the radial, which ends at 

 beyond three-fourths of the length. Fore branch of the cubital 

 curved, moderately long, ending at half the length between the 

 radial and the hind branch, which ends at hardly in front of the tip 

 of the wing. Four complete externo-medial veins. Subanal join- 

 ing the anal on the border of the wing. Median veinlet short, dis- 

 tinct. Discal areolet hexagonal, more than thrice longer than 

 broad ; its sides parallel. 



Europe. 



1. Xylophagus ater. 



Niger ; thorax fceminae cinereo trivittatus ; pedes fulvi, femoribus 

 apice tibiis tarsisque posticis fuscis; alee hyalince, fusco 

 fasciata. 



Xylophagus ater, Fabr. Zett. Dipt. Scand. i. 128, 1 ; viii. 2747, 1. 

 Roser, Verz. Wurt. Dipt. 6. 



2. Xylophagus cinctus. 



Niger ; thorax foeminae cinereo trivittatus ; abdomen rufo cinctum ; 

 pedes fulvi, femoribus apice tibiis tarsisque posticis fuscis ; 

 alee hyalince, fusco fasciatce. 



Nemotelus cinctus, Deg. Ins. vi. 75, 6, pi. 9, f. 19 — 21. 

 Xylophagus cinctus, Fabr. Syst. Antl. 65, 2. Latr. Gen. Crust, iv. 



272. Meig. Zweifi. ii. 12, 2. Macq. Hist. Nat. Dipt. i. 230, 



2. Zett. Dipt. Scand. i. 158, 2. 



Asilus ? SchelL Genr. Monch. pi. 30, f. 2. 



Xylophagus ater var., Fall. Dipt. Suec. 13, 1. 

 Xylophagus ater, var. ? 



3. Xylophagus compeditus. 



Niger ; thorax cinereo trivittatus ; pedes flaw, femoribus posticis 

 apice supra fuscis, tibiis posticis fusco annulatis ; alee hya- 

 lince strigis fiavescentibus, venis transversis infuscatis. 



Xylophagus compeditus, Weid.; Meig. Zweifi. ii, 13, 3. 

 Austria. 



