632 Prof. Mario Bezzi’s Report on a Collection of 
TYPE ? and an additional specimen from West Nyasa, 
Mzimba and Mbwabwa, in Momberas District, May-June 
1909 (Dr. H. S. Stannus). 
44. Litorrhynchus dentiferus, sp. nov. (Plate L, fig. 11.) 
g. Length of the body 17 mm., of the wing 20 mm., of the wing- 
expanse, 45 mm, 
A beautiful species very near the preceding, but readily 
distinguished by the different colouring of the thorax and wings. 
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 2, from West Nyasa (Dr. H. S. Stannus); a single 
specimen. 
B. Second group. Colour of the body and of the wing- 
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 14 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). Propleural 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 
rostratus, Loew. 
5 (4). Middle band dilated towards its lower end, filling almost the 
whole of the second and third posterior cells 
dilatatus, sp. n. 
