﻿Bombyliidae {Diptera) from Central Afrien. 623 



The dark portion of the wings is not so sharply limitcil, and is 

 variegated with clearer streaks ; the dark spot at the base of the 

 third posterior cell is isolated ; upper branch of the cubital fork very 

 strongly bent ; anal cell broadly open, and with the apical half 

 hyaline (not the apex alone as in A. Itoniogenem^). Prediscoidal spot 

 rlear. 



Type ^ and another specimen from North Nyasa, 

 Akamauga, South Rukuru River, October 8, 1909 {Dr. J. B. 

 Davcy). Three other specimens taken in the same locality 

 by the same collector, October 10, 1909, are less typical. 



30. Anthrax 'pusillus, Wiedemann (1821). 



This species also has not previously been recognised as ati 

 Arfiiimmocha in the catalogues. It is near A. Icucogasfrr 

 and volitans, but this last shows white hairs on the side of 

 the abdomen. The two brown clouds of the wings are 

 often indistinct. After the small cross-vein, the border 

 of the dark portion of the wings shows a deep hyaline 

 indentation. 



Three specimens from North Nyasa, Nyungwi stream, 

 November 26, 1909, and Karonga to Fort Hill, near 

 Lufira River, May 30, 1909 (I)r^J. B. Daveij). 



11. Villa, Lioy (1864). 



The old genus Anthrax of authors, which, however, 

 cannot retain this name, must be divided into several 

 smaller genera. 



The species of the Old World can be divided into the 

 three following groups: — 



1 (4). Face rounded ; third joint of the antennae short. 



2 (3). Very like Anthrax {Anjyramoeha) in appearance, colouring 



and wing-pattern ; pulvilli often present ; larvae living on 

 parasitic Diptera or Hymenoptera . Heinipenthes, hoew. 



3 (2). Species not closely resembling Antluax ; pulvilli always 



wanting ; wings without dark pattern, mostly wholly 

 hyaline ; larvae parasitic on Lepidoptera . Villa, Lioy 

 4(1). Face conically prominent ; third joint of the antennae elon- 

 gate ; pulvilli wanting ; wing-pattern normally present ; 

 larvae preying on the egg-cases of locusts 



ThyHdanthi((x, Ost.-Sack. 



Of the first group there are no species in the collection 

 before me. 



The second group, Villa, is the one which was called 



