WERNER MARCHAND 115 



The very characteristic and strikingly pigmented larva (Plate 3, 

 Fig. 53) was, according to Neave, common in the mud of the forested 

 streams from the end of September. It may be distinguished at a 

 glance from other similarly pigmented species by the white trefoil- 

 shaped area on the dorsum of the anal segment. This is a voracious 

 and predacious larva and troublesome to keep in the laboratory for 

 that reason. 



The pupal aster is of the normal type, the spines of the dorsolateral 

 comb being few in number but somewhat long. A small series of 

 adults was bred by Neave from the larvae above described. A cer- 

 tain number of these flies belonged to the type of Tabanus sharpei 

 Aust., and the two forms, the larvas of which are identical, are con- 

 nected by a great variety of intermediates. 



The larva is j&gured (Plate 3, Fig. 53), also the pupal aster of the 

 male and the dorsolateral comb of both sexes (Plate 15, Fig. 184, a, 

 b, c). In the figure, the larva looks much like that of Tabanus atratus 

 but the lateral stripes are poorly developed except on the thoracic 

 and on the ninth and tenth segments, while on the eleventh segment 

 they are more completely fused with the transverse ones into a broad 

 pigmented band. 



Tabanus kingi Austen. — Tabanus kingi, recorded from Khor Arbat, 

 Sudan, Africa, is a species superficially resembling Tabanus tceniola, 

 and allied to species of Tabanus from Abyssinia at present unde- 

 scribed. The life history has been worked out by King (1910), who 

 observed the species in Khor Arbat, in a locality consisting of a 

 stream of slightly brackish water running in a gorge on a rocky hill. 

 On emerging from the hills into the plain the stream disappears in 

 the sand. In the autumn, during the brief rainy season, it comes 

 down in sudden overflow, and is then of considerable size, but in April, 

 the month in which these observations were made, it is, except where 

 there are pools, not more than a few inches in depth. The bed of 

 the stream is stony and there is little or no vegetation on its banks. 



The female fly deposits her eggs in a rounded mass on a rock 

 rising sheer from the water generally slightly overhanging, and 

 from six to fifteen inches above water level. Rocks chosen for 

 this purpose overhang comparatively deep pools, from eighteen 



