LBombyluidae (Diptera) from Central Africa. 631 
42. Litorrhynchus argyrolepis, sp. nov. 
3 @. 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 pubescence 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. Halteres 
blackish. Abdomen black, more or less red on the sides and at the 
hind margin of the segments; first 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 f and 2 and another specimen from West Nyasa, 
Nora, Choma and Mzimba, May—August, 1909 (Dr. 7. 8. 
Stannus). 
43. Litorrhynchus ricardo, sp. nov. (Plate L, fig 10.) 
Q. 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 ; halteres 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 Bombyluds. 
CT 2 
