Wasps of the Genus Tachytes. 15 
absence of teeth on the clypeus and the much deeper emar- 
gination of the eighth sternite. 
10. Tachytes nigropilosella, Cam. 
Liris nigropilosellus, Cam. Ann. Transvaal Mus. ii. p. 182 (1910), 
Tachytes gigas, Bisch. Arch. f. Naturges. A. 3, p. 66 (1913). 2. 
&. Seventh tergite rather broadly truncate, clothed with” 
dark brown sete, eighth sternite twice as long as broad, the 
sides parallel, the apex shallowly emarginate. 
Hab. Natal, Durban (Distant) ; Mashonaland, Salisbury 
(G. A. K. Marshall), January, $2? ; N.E. Rhodesia, 
Serenje district, 4500 ft. (S. A. Neave), December; Nyasa- 
land, Mlanje (S. A. Neave), February. 
ll. Tachytes natalensis, Sauss. 
Tachytes natalensis, Sauss. Mem. Soc. phys. & hist. nat. Genéve, xiv. 
pt. 1, p. 21, n. 10, t. 1. fig. 4 (1854). 3. 
Tachytes natalensis, Sauss, Reise d. Novara, Zool. ii. pt. 1, Hymen. 
p- 68 (1867). ¢. 
Q. Nigra; mandibulis in medio, tarsis anticis articulis tribus 
apicalibus, intermediis posticisque articulo apicali, tegulisque 
apice ferrugineis; fronte clypeoque argenteo-pubescentibus, area 
pygidiali aureo-setoso, alis fusco cxeruleis, venis nigris. 
6. Femine similis, tarsis anticis omnino ferrugineis. 
Long., 2 17 mm., ¢ 14 mm. 
@. Clypeus truncate at the apex, with large sparse 
punctures, the space between the large punctures very 
minutely and closely punctured. Eyes separated on the 
vertex by a distance equal to twice the length of the third 
joint of the flagellum; second joint of the flagellum 
distinctly longer than the third. Head and thorax opaque, 
closely microscopically punctured ; median segment opaque, 
narrowed to the apex, nearly as long as the mesonotum, a 
shallow sulcus on the apical quarter continued munch more 
deeply on the apical truncation, which is coarsely trans- 
versely striated. Abdomen shining, the dorsal surface 
microscopically punctured ; second sternite finely and closely 
punctured, with a shining and smooth triangular space on 
the middle of the apical margin. Pygidial area subtriangular, 
the sides a little longer than the base, the apex narrowly 
rounded, closely clothed with golden sete which change in 
side lights to blackish. Basal joint of fore tarsi with five 
spines. 
6. Clypeus very broadly rounded at the apex; the 
