74 H. C. EFFLATOUN. 



7. EUISTALIS LATH. 



Latr., Hist. Nat. Crust, Ins., III. (1802) et XIV. 363. (1804). 



SYNONYMY:— Palpada Macq., Suit, a Buff., I. 512. 19. 



(1834). 



Priomerus Macq., Suit, a Buff., I. 511. 18. (1834). 



Syrphus Zett. (raec. Fabr.), Ins. Lapppn., Dipt., 591. 52. (1838) 



Eristalinus Rond., Nuov. Annal. Sci. Nat, Bol. (2). II. 453. I. 



(1844). 



Eristaloides Rond., Nuov. Annal. Sci. Nat. Bol., (2) II. 453. 3. 



(1844). 



Dolichomerus Macq., Dipt. Exot, suppl. 4., 131. (1849). 



Eristalomyia Rond., Dipterol. Prodr., II. 38. 2. nota (Erista- 

 lomya) (1857). " 



Simoid&s Lw, CEfv. Vet, Akad. Forh., NIV. 382. 14. (1858). 



EriopsLlOY, Atti. Inst. Veneto, (3). IX. 743. 1. (1864). 



Doliosyrphus Big., Annal. Soc. Ent. Fr., (6). II., CXX. (1882). 



Dolyosyrphus Big., Annal. Soc. Ent, Fr., (6). III. 228. (1883). 



Eristatodes Mik, Wien. Entom. Zeitg., XVI. 114. (1897). 



Lathyrophthalmus Mik, Wien. Entom. Zeitg., XVI. 114. 

 (1897). 



Large or rather large bee-like flies, which are distinguished 

 from all other Egyptian Genera by the peculiar venation of the 

 radial and cubital veins. 



Head moderate or rather large; face with a distinct central 

 knob and a moderately produced upper mouth edge, this latter be- 

 ing more or less descending. The central knob is always left shin- 

 ing black, clear of the pale dust and pubescence which cover and 

 obscure all the sides of the face and most of the frons. Face always 

 separated from the jowls by clear bright black spaces. Frons not 

 conspicuously produced and always distinctly pubescent. Eyes al- 

 ways touching in the male, sometimes spotted and always hairy; 



