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



S. 7iig'}'ipes, Loew (1863), from the Cape is the same species, 

 and both are very closely allied to the European S. leuco- 

 phaeus, Meigen. The species is known from South and 

 West Africa ; iu the collection are seven specimens of both 

 sexes from West Nyasa, Mzimba, May and June 1909 

 {Dr. H. S. Stanmis). 



4. Systoechus rohustus, sp. nov. (Plate L, fig. 1.) 

 (^ Ç. Length (3 specimens) 1.3 to 14 mm.; proboscis 8 to 8h mm. 

 A very robust species, easily distinguished by the short and dense 

 yellowish pubescence of the body, there being no black hairs or 

 bristles whatever on the thorax and abdomen. 



Eyes of the male somewhat widely separated, the front of the 

 female being twice as wide as that of the male ; the median frontal 

 furrow very little developed ; all the hairs of head yellowish ; 

 antennae black, the third joint very thin in the apical third, where 

 it is yellow ; terminal style very minute ; proboscis black, 10 mm. 

 long ; ground colour of the head black, the sides of the mouth 

 yellow. Thorax densely clothed with short greyish hairs, those on 

 the sides being a little paler ; prealar bristles whitish ; scutellum 

 dark red . Squamae brownish, with a dense fringe of white hairs ; 

 haltères white. Abdomen black, but in the male the sides and the 

 hind margins of the segments are reddish ; the pubescence as on 

 the thorax ; bristles wanting. Legs wholly reddish-yellow, only the 

 trochanters and the last tarsal joints being black ; with scanty 

 whitish tomentum ; all the bristles black, those of the hind femora 

 very strong. Wings somewhat greyish, with a reddish-brown tinge 

 on the basal portion, which extends from the end of the first vein 

 obliquely to the basal cross-veins and to the middle of the anal cell. 

 Basal comb strong, black ; veins mostly rufous, the first bright red ; 

 second and third longitudinal veins closely approximated till the 

 middle of the first posterior cell. 



This species seems to be allied to S. ferrugineus, Macq. 

 (1834), from Senegal. 



Type $, North Nyasa, on the road from Karonga to 

 Fort Hill, near Chikvvete's village, May 21, 1909 {Dr. 

 J. B. Davey). Type ?, W. Nyasa, Mzimba, May 1909 

 {Dr. H. S. Stannus). Another male specimen, in poor 

 preservation and denuded, from the same locality as the 

 female type. 



5, Systoechus simplex, Loew (1860). 



The species is known from South and East Africa. 



In the collection are two specimens which I refer with 



