﻿Bomhjliidae (Dipfcra) frovi Central Africa. 631 



42. Litorrhynchus argyrolepis, sp. nov. 



(^ 9. Length (of 3 specimens), 12-13 mm. Closely allied to the 

 preceding species, but easily distinguished from this and from all 

 the others by the squamulae being fringed with silvery hairs. Head 

 reddish-brown ; frons and face with yellow pul)escence and black 

 hairs ; antennae red, with the third joint and the style black ; 

 proboscis black, 5-6 mm. long. Thorax wholly black, with yellowish 

 pubescence and black bristles ; pleurae with black and reddish hairs 

 intermingled ; hypopleural tuft black, scutellum red, narrowly black 

 at base, clothed like the thorax, with 8-10 marginal bristles. Hdteres 

 blackish. Abdomen black, more or less red on the sides and at the 

 hind margin of the segments; tirst segment with white hairs on the 

 sides; the other segments with dense black hairs on the sides ; sixth 

 and seventh with white scales ; the usual white spots on the third are 

 very well developed. Legs red, with black bristles ; tarsi darkened. 

 Pattern of the wings as in L. nyasae ; the middle cross-band is often 

 narrowed towards the hind margin of the wings, not filling up the 

 whole width of the end of the third posterior cell. 



Types ^ and Ç and another specimen from West Nyasa, 

 Nora, Chôma and Mzhiiba, May-August, 1909 {Dr. IT. S. 

 Sta7inus). 



43. Litorrhi/nchus ricardoi, sp. nov. (Plate L, tig 10.) 

 Ç. Length of the body (of 2 specimens) 14-15 mm., of the wing 



17-18 mm., of the wing-expanse 38-41 mm. 



Very near the preceding, but larger, with clearer wing-pattern, 

 and with the marginal cell narrowly hyaline at the end. 



The hairs on the frons are black, those on the face wholly whitish ; 

 antennae red, the third joint blackish ; hind margin of the eyes 

 whitish. Thorax red, with three longitudinal black stripes, which 

 unite at a single spot in front of the scutellum ; the hairs of the 

 collar and of the pleurae are all of a golden colour ; the bristles 

 are black-. Scutellum red, with a marginal row of black bristles. 

 Squamulae with a thick golden fringe ; haltères blackish. Abdomen 

 red, with a narrow median black stripe, which does not extend 

 beyond the fourth segment ; the hairs on the sides of the first 

 segment are white, the others black ; the usual white spots are well 

 developed ; underside, red. Legs wholly red. Markings of the wings 

 yellowish-brown, darkened towards the margins of the bands ; their 

 general shape as in L. nyasae, with the above-noted differences ; 

 the hyaline spot in the second basal cell is very greatly developed. 



Named in honour of Miss G. Ricardo, who has done 

 good work in studying the South African Bombyliids. 



TT 2 



