A MONOGRAPH OF THE GENUS OSPRHYNCHOTUS. 27 



4. OsPRHYNCHOTUs RUFicEPS, Cam. 

 Osprynchotus rujiceps, Cam. Ann. S. 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 tibiae flavous with 

 extreme base, and a band at their apex not longer than their 

 calcaria, black; hind tarsi flavous with a band at their base 

 shorter than the calcaria, and onychii, 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 0. 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 Eiver 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. Boss and A. J. Cholmley, 

 1906), Johannesburg and Sterkfontein (H. P. Thomasset), and 

 Pretoria (Distant). 



5. OsPRHYNCHOTUS PULCHERRIMU8, Kirby. 



Cryptus pulcherrimus, Kirby, Bull. Liverpool Museum, iii. 1900, 



p. 14, and ' The Natural History of Sokotra and Abdelkuri,' 



by H. 0. Forbes, 1903, 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 1 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. 135, 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 Brulle's and that of 0. 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 beheve, been misunderstood 

 by all subsequent authors. Schulz professes to recognize it 

 from both Senegal and Senegambia. I have seen but a single 



