﻿TO MAN AND ANIMALS IN MOZAMBIQUE, SOUTH AFRICA. 215 



Family Simuliidae. 



Simulium griseicollis, Becker. This species is very common in the Western 

 Transvaal and Cape Colony. In 1907, I found it very abundant at Warrenton, 

 Cape Colony. 



Simulium nigritarse, Coq. Occurs on the high veld of the Transvaal. I have 

 taken them in trains on the Lourenco Marques-Pretoria railway. 



This family seems to be found very rarely in the parts of Mozambique which I 

 have visited, probably because of the flat nature of the country with its sluggish 

 rivers and streams. 



Family Tabanidae. 



Chrysops stigmaticalis, Loew.* Grriinberg records this species from " Delagoa 

 Bay." I have never taken it in the Province, although I have seen specimens, 

 taken on the Busi river, in the collections of the Department of Agriculture at 

 Beira. 



Chrysops longicornis, Macq. A specimen in the Transvaal Museum bears the 

 label " Pungwe Bay " (Beira harbour). I have never taken it myself. 



Tabanus africanus, Gray. One of the commonest Tabanids throughout the 

 Province. They appear in the largest numbers during October and are most 

 often seen in the vicinity of rivers. Adults seem to be absent during the dry 

 season. Although I have never seen them actually biting they are frequently 

 numerous in pasture lands and stables. 



Tabanus biguttatus, Wied. Found everywhere in the Province, most commonly 

 near water ; frequently seen in pasture lands and stables,, Occurs throughout 

 the year, but most abundant just before and during the early summer rains. 



Tabanus unitaeniatus, Ric. I have never taken this species. It was described 

 originally from specimens taken on the Pungwe River, near Beira. 



Tabanus ustus, Walk. Specimens were taken in the vicinity of Lourenco 

 Marques and on the Maputa River. It occurs during the early wet season but 

 is never very abundant. 



Tabanus taeniola, P. de B. This is the most common Tabanid in the Province 

 of Mozambique, and in conjunction with its variety, variatus, Walk., it appears 

 to be represented by more individuals than all the other species taken together. 

 It is very abundant along streams, but is often found in houses and stables at 

 some distance from water. Most numerous during December and January, but 

 in the northern districts the species is found throughout the year. It also occurs 

 in the Eastern Transvaal. Frequently bites severely. f 



Tabanus taeniola, var. variatus, Walk, (sagittarius, Macq.) Found in company 

 with typical taeniola throughout the Province ; also found in the Eastern 

 Transvaal and Southern Rhodesia. 



* [Since Mr. S. A. Neave has succeeded in obtaining both sexes of the closely allied species, 

 Chrysops distinctipennis, Aust., there can now be hardly any doubt that C.fusca, Ric., is the 

 male of C. stigmaticalis, Lw. — Ed.] 



f [Hundreds of specimens of this abundant and widely spread species have been received by 

 the Entomological Research Committee from all parts of Tropical Africa. From these it 

 appears that in West Africa the typical form greatly predominates, not more than from 5 to 10 

 per cent, of the specimens being referable to var. variatus, whereas in East Africa the propor- 

 tions are almost exactly reversed. Although the extreme forms appear strikingly different, 

 every intergrade can be found in a good series. The author had recorded the variety as a 

 distinct species. — Ed.] 



