Wasps of the Genus Tachytes. 23 
distance between the recurrent nervures on the cubitus 
slightly greater than the second abscissa of the radius. 
Hab. Pretoria (Distant). 
Very nearly related to 7’. argenteovestita, Cam., and T. bulu- 
wayoensis, Bisch., but differs from both in only having five 
spines on the basal joint of the fore tarsus, instead of six as 
in those species; it also differs from buluwayoensis in the 
colour of the pubescence on the pygidial area; and from 
argenteovestita in the colour of the tarsi and in details of 
neuration. 
*23. Tachytes buluwayoensis, Bisch. 
Tachytes buluwayoensis, Bisch. Arch. f. Naturges, A. 3, p. 68 (1918). 
g. 
?. Differs from distanti in having six spines on the basal 
joint of the fore tarsus, and in having the pygidial area 
clothed with reddish-brown set. 
Hab. 8. Rhodesia, Bembesi; January. 
*24. Tachytes argenteovestita, Cam. 
Tachytes argenteovestita, Cam, Ann, Transyaal Mus. ii. p. 130 (1910). 
2. 
Differs from distanti in having six spines on the basal 
jomt of the fore tarsus, and in the much shorter second 
abscissa of the radius, also apparently in the colour of the 
tarsi, 
I am doubtful if bulwwayoensis is really distinct from 
argenteovestita, the details of geuration as to the comparative 
length of the abscisse of the radius being very unreliable 
in this genus, and the other differences given by Bischoff 
may be due to very slight inaccuracies in Cameron’s 
description. 
Hab. Transvaal, Pietersburg ; December. 
25. Tachytes dilaticornis, Turn. 
Tachytes dilaticornis, Turn. Ann. & Mag. Nat. Hist. (8) xvii. p. 446 
(1916). ¢. 
2. Nigra; capite argenteo-pubescente; thorace segmentoque 
mediano pallide et sparse aureo-pilosis; abdomine lete aureo- 
pubescente, segmentis dorsalibus fascia apicali densius aureo- 
pubescente, segmentis dorsalibus et ventralibus apice late brun- 
neis ; tegulis fuscis; alis flavis, apice latissime infumatis, venis 
testaceis. 
