On the Bombyliid Fauna of South Africa (Dipteral). 41 



spines are black, but those of the four anterior tibiae are partly 

 yellow. Front ;m>l middle femora with rather numerous but short 

 spines below ; hind femora with 9-10 strong spines on the complete 

 inferior row, the other rows being reduced to a few spines on the 

 apical half. Claws black, with red base: pulvilli whitish, about as 

 long as the claws. Wings hyaline, narrowly yellowish at the extreme 

 base, in the first basal and in the costal cells ; alula almost hyaline, 

 with a short yellow fringe : basal comb of large size, black, yellow 

 tomentose near the base. Veins red, a little darkened at end : venation 

 as in the preceding, with the oval cell broadly open. 



SYSTOECHUS SIMPLEX, Loew, 1860. 



A species closely allied to the preceding one, but at once distinguished 

 by the smaller size, the whitish, not fulvous, pubescence, the unarmed 

 front femora, and by having a few but distinct black bristles on the 

 sides of the last abdominal segments. 



Some specimens of both sexes from Stellenbosch and Hex River, 

 (Cape) (L. Periuguey), December, 1884. 



The uudescribed female is very like the male ; the frous is very 

 broad, with some bristly dark hairs on each side; palpi short, clavate, 

 yellow, with black end ; femora entirely yellow to the extreme base. 

 Upper areolets of the eyes of the male a little enlarged : frontal 

 triangle small and with a less developed middle furrow ; third anteunal 

 joint linear ; labium smooth below. Spicules of the 4 anterior tibiae 

 well developed, partly yellow : front femora without spines, middle 

 femora with 3-4 long spines : pulvilli as long as the claws. 



SYSTOECHUS TUJIIDIFKONS, sp. uov., . 



Readily distinguished by the broad and tumid frontal triangle, the 

 black scutellum, the face fringed with rigid black hairs, the yellow 

 legs and the strongly iufuscated base of the wings. 



Type , a single specimen from Barbertou. Transvaal, April, 

 1911 (H. Edwards). 



Length of body 10 mm. ; length of a wing 9 mm. Head black, 

 dusted with grey dark yellow at the mouth borders and on the chin ; 

 occiput less developed than in all the preceding species, almost 

 hollowed instead of being inflated, clothed with dense, rather long, 

 pale yellowish hairs ; chin and lower part of occiput with a long, 

 conspicuous, quite white beard. Frons at the narrowest point as broad 

 as the ocellar tubercle, and afterwards expanded in a very broad and 

 inflated frontal triangle, the middle furrow of which is distinct but not 



