34 LIST OF DIPTERA. 





C. Trichomyia, Haliday. 



Wings with five external cells, second petiolated, third complete : 

 brachial cells not exceeding the first third of the wing ; costal 

 cells half divided ; veins very hairy : feelers long ; first and se- 

 cond joints thick, the rest longer, somewhat conical : volves of 

 oviscapt broad ovate. 



Psychoda urbica, Haliday, Curt. Brit. Ent. 745, 

 a. England. From Mr. Walker's collection. 



D. Sycorax, Haliday. 



Wings with five external cells, second petiolated, fifth incomplete ; 

 three costal cells, two brachial, extending to the middle of the 

 wing ; veins only pubescent : body nearly naked : feelers slender, 

 pubescent ; first joint very short, second globose, the rest linear. 



Psychoda silacea, Haliday, Curt. Brit. Ent. 745, 10. 

 a. England. From Mr. Walker's collection. 



Section IV. Rostratje. 



Erioptera, Meigen. 



A. A discoidal cell. 



Erioptera maculata, Meig. Dipt. i. 109, 1. Macq. Hist. Nat. Dipt. 



i. 110, 1. 

 a. England. From Mr. Walker's collection. 



Erioptera cinerascens, Meig. Dipt. i. 114, 15. Zett. Ins. Lapp. 



831, 11. Macq. Hist. Nat. Dipt. i. 110, 2. Gim. Bull. Soc. 



Imp. Nat. Mosc. vii. 421—1846, iii. 19, 7. 

 a. England. From Mr. Walker's collection. 



A A. No discoidal cell. 

 a. All the veins hairy. 

 B. The two basal cells of equal length. . 



Erioptera flavescens, Meig. Dipt. i. 109, 2. Zett. Ins. Lapp. 830, 

 1. Gim. Bull. Soc. Imp. Nat. Mosc. iv. 344, xv. 642—1846, 





