158 



window "), and Kumasi, October 26th, 1907, " caught under leaf 

 in bush-path" (Dr. W. M. Graham, W.A.M.S.). Congo Free 

 State : " caught on shot buffalo four hours canoe journey above 

 Sendwe, November 9th, 1904 "* (Drs. Dutton, Todd, and Christy}. 

 The latter specimens (a male and female) are among those referred 

 to by Dr. J. L. Todd,f in the following note on Stomoxys omega as 

 met with in the Congo Free State by the members of the Expedition 

 of the Liverpool School of Tropical Medicine to the Congo, 1903-05. 

 " This fly," writes Dr. Todd, " was seen only near water. Some 

 were caught in canoes, others on a buffalo shot in a marsh, on 

 which they were feeding. When the buffalo was first seen it was 

 lying half-covered in water, no doubt to avoid the Stomoxys, which 

 were present in almost incredible numbers." 



A remarkable feature exhibited by the male of this species, which 

 is indicated as well as possible in the figure, is a fringe of long, fine, 

 curled hair on the inner side of the first two joints of the front tarsi. 

 The front tibiae, too, in the same sex, have a thickish fringe of 

 straight hair on the posterior side of their distal halves. The 

 female of S. omega closely resembles that of S. inornata, Griinb. 

 (Plate XIII., fig. 97), but may be distinguished by the narrower 

 front, by the upper inner margins of the eyes bordering the front 

 being exactly parallel instead of slightly divergent below, by the con- 

 spicuously shorter proboscis, and by the marking of the anterior 

 portion of the dorsum of the thorax in front of the transverse suture. 

 In the female of the present species the Q-like marking, though 

 less distinct than in the male, is still visible ; in the female of S. 

 inornata, however, there is no such marking, but simply a broad 

 clove-brown or black stripe on each side of the median grey one ; 

 the clove-brown or black stripes have their inner margins straight, 

 their outer margins convex, and at their anterior extremities are 

 much narrower than where they meet the transverse suture. 



* With Stomoxys nigra, Macq., cf. p. 154. 



t Annals of Tropical Medicine and Parasitology, Series T.M., Vol. L, No. L, p. 88 

 (February 1, 1907). 



