﻿632 Prof. Mario Bezzi's Report on a Collection of 



Type Ç and an additional specimen from West Nyasa, 

 Mzimba and Mbwabwa, in Momberas District, May-June 

 1909 {Dr. H. S. Stanmcs). 



44. Litovrhynchus dentiferus, sp. nov. (Plate L, fig. 11.) 



^ . Length of the body 17 mm ., of the wing 20 ram., of the wing- 

 expanse, 45 mm. 



A beautiful species very near the preceding, but readily 

 distinguished by the different colouring of the thorax and Mnngs. 



Antennae wholly red. Thorax with the two longitudinal stripes 

 very narrow and wide apart, and without a black spot in front of 

 the scutellum ; a whitish stripe on the sides of the back ; the 

 thoracic bristles are yellow, but those on the margins of the 

 scutellum are black. Abdomen red; the first three segments with 

 a median triangular black spot only ; genitalia red, with a yellow 

 fringe. Legs wholly red. Pattern of the wings as in L. ricardoi, 

 but of a more yellow tint ; the tooth-shaped projection on the first 

 posterior cell is very characteristic ; the base of wing is yellow ; the 

 spot in the second basal cell is smaller and less hyaline. 



Type ^, from West Nyasa {Br. H. S. Stannus) ; a single 

 specimen. 



B. Second group. Colour of the body and of the Aving- 

 pattern black. Palpi darkened. Genitalia of the male 

 black. The vein dividing the second from the third 

 posterior cell much less curved forward, and therefore the 

 third posterior cell only li times broader than the second. 



While the species of the first group seem to be 

 principally confined to South and East Central Africa, 

 those of this second group are more prevalent to the 

 North of the Equator. The species before me are to be 

 distinguished as follows : — 



1 (2). The marginal cell is filled with black in its whole length, 



the black pattern extending even a little beyond its end 



repletus, sp. n. 



2 (1). The marginal cell is broadly hyaline at apex. 



3 (6). Proplenral and metapleural hairs black; small cross-vein 



without pellucid spot. 



4 (5). Middle band of the wing narrowed towards its lower end, 



filling only a part of the third posterior cell 



rostratvs, Loew. 



5 (4). Middle band dilated towards its lower end, filling almost the 



whole of the second and third posterior cells 



dilatutus, sp. n. 



