﻿h'oiiilii/liùhit' (Vip/.cra) from dutrol Africa. (515 



8. Fe/.rorossia, Bezzi (1908). 



This genus was erected by lue for tlie well-known 

 Mediterranean Arfiyrnmoeha hc.spems, and is included in 

 the monograph of Dr. Sack (1909), with this species alone. 

 I am now very glad to find that it is well represented in 

 Africa, as the collection comprises no fewer than four 

 distinct species. 



The genus is easily distinguishable from any of its allies ; 

 it most closely resembles Chionamoeha, Sack, from which 

 it differs chiefly in the form of the di.scal cell and in the 

 origin of the second longitudinal vein. 



The species before me can be distinguished as follows : — 



1 (4). Species more robust and of greater size, without golden 



tomentuni on thorax, scutelhiin and abdomen ; frons 

 opaque ; abdomen wholly brown, or with a small yellow- 

 ish marking on the sides only. 



2 (3). Frons with black hairs ; abdomen wholly brown, or with 



only a small yellowish patch at the extreme base, with 

 black bristles on the sides ; upper branch of third vein 

 normally with a recurrent veinlet . hesperus, Rossi. 



3 {-1). Frms with white hairs; abdomen with a narrow yellowish 



lateral stripe along its whole length and without black 

 bristles on the sides ; upper brancli without appendix 



Idho, Wied. 



4 (1). Smaller and delicate species, clothed with golden tomentuni ; 



abdomen orange-red, with or without a median longi- 

 tudinal dark stripe ; frons shining black. 



5 (6). Face with white hairs ; abdomen with a broad median black 



stripe ; second longitudinal vein strongly bent near the 

 apex ; upper branch of the third vein bent at an angle 

 and^here with an ap])endix ; anal cell narrowly open 



fidoipes, Loew. 



6(5). Face with black hairs; abdomen without median stripe; 



second vein slightly curved, as also the upper branch of 



the third, which is without appendix ; anal cell widely 



open (jraiiuaa, sp. n. 



IG. Petrorossia Ites'perus, Rossi (1790). 



A single female of great size (length 10 mm.), from N. 

 Nyasa, on the road from Karonga to Fort Hill, near 

 Kaseye, June 1, 1909 {Ur. J. B. Davey),\\h\c\\ agrees very 

 well with our Italian specimens. The femora are wholly 

 yellow, and there is no appendix to the upper branch of 

 the third vein ; the wings are hyaline, and oidy slightly 

 infuscated toward the fore margin. 



ÏS 2 



