TXTTtODUCTTON. 



A special feature of the Region is the richness and variety of 

 the genera Asarcina, Graptomyza, Syritta, and Eumerus ; there 

 are also many peculiar forms of Microdon. But the most prominent 

 character is to be found in the great development of the forms 

 of the Hlristalis-gro\ip. The genus Protylocera is exclusively 

 Ethiopian*, and the genera Phytomia (Megaspis), Simoides, Lathy - 

 rophthalmus, and Eristalodes are very rich in characteristic species. 

 The genus HelopJiilus is almost entirely restricted to the subgenera 

 Mesemlrius and Prionotomyia. 



In the following pages descriptions of the new genera and new 

 species are given, together with tables of all the genera and species 

 represented in the collection and remarks on the previously described 

 forms. 



I have to thank Mr. Guy A. K. Marshall, the Director of the 

 Imperial Bureau of Entomology, for having placed at my disposal 

 such an important collection of Ethiopian Syrphidae, which is 

 without any doubt the most extensive yet brought together. 



* The South- American Eristalis nigripennis, Macquart, which, according 

 to Dr. Speiser (Jahrbiich. d. Nassauisch. Ver. f. Naturk. i. Wiesbaden, Ixvi. 

 1913, p, 122), belongs to Protylocera, is really a true Eristalis. 



