A MONOGRAPH OF THE GENUS OSPRHYNCHOTUS. 27 
4, OSPRHYNCHOTUS RUFICEPS, Cam. 
Osprynchotus ruficeps, Cam. Ann. 8. African Mus. 1906, p. 142, 
female. 
Male and female. A black species, with flagellar band 
stramineous; female with head, under side of scape, and most 
of prothorax red; male with face, under side of scape flavous, 
thorax black; both sexes have the hind tibiew flavous with 
extreme base, and a band at their apex not longer than their 
calearia, black; hind tarsi flavous with a band at their base 
shorter than the calecaria, and onychu, black ; wings violaceous; 
length, 21 mm., terebra, 10 mm. I greatly doubt if this species 
be aught but a small and southern form of the last; Cameron 
did not know O. gigas, Kriech., and the present species seems 
separable from it only in its smaller size and narrower black 
hind tibial band. It was described from the Umvoti River in 
Natal; and I have seen a dozen examples, agreeing in the above 
characters, from East Karoo, in Cape Colony (A. Howarth), Port 
Natal, in 1856 (Mr. Plant), Howick, in Natal (J. Cregoe), the 
Transvaal on November 29th, 1896 (A. Ross and A. J. Cholmley, 
1906), Johannesburg and Sterkfontein (H. P. Thomasset), and 
Pretoria (Distant). 
5. OSPRHYNCHOTUS PULCHERRIMUS, Kirby. 
Cryptus pulcherrimus, Kirby, Bull. Liverpool Museum, iii. 1900, 
p. 14, and ‘The Natural History of Sokotra and Abdelkuri,’ 
by H. O. Forbes, 19038, p. 237. 
The type was taken at Homhil (one female) at 1500 ft. in 
Eastern Sokotra on January 23rd, 1899; and cotypes:—One 
female at Dahamish at 350 ft., in Sokotra, on December 24th, 
1898; one female at Goahal Valley, in Eastern Sokotra, on 
January 16th, 1899, and one male at Thluteed at 1200 ft., in 
Sokotra, on January 15th, 1899. All these are in Mus. Brit. 
The lack of all black or red markings renders this species 
conspicuously distinct ; its mouth is no less rostriform than in 
its congeners, and I was in error (Entom. 1911, p. 212) in 
ascribing it to the genus Acroricnus croricnus, Ratz. 
6. OsPRHYNCHOTUS FLAVIPES, Brulle. 
Hist. Nat. Ins. Hym. iv. 1846, p. 185, female; (?) Tosq. Mem. 
Soc. Ent. Belg. 1896, p. 246, male, female. 
This species was originally recorded from Senegal only; 
subsequently, Tosquinet, whose description looks like a com- 
pound of Brullé’s and that of O. gigas, Kriech., adds such diverse 
localities as Togoland, Angola, the Cape, Tanganyka, the Congo, 
and Scioa, but I place no reliance upon his -knowledge of the 
present genus. In my own experience, which is slender, this 
species is extremely rare, and has, I believe, been misunderstood 
by all subsequent authors. Schulz professes to recognize it 
from both Senegal and Senegambia. I have seen but a singie 
