Mr. R. E. Turner on Fossorial Hymenoptera. 293 
to the length of the two basal joints of the flagellum in the 
female atid by a distance equal to twice the length of the 
second joint in the male. Pygidial area of the female 
strongly punctured, long and narrow, pointed at the apex. 
The median segment is opaque and coriaceous. 
flab. Willowmore, Cape Province (Dr. Brauns). 
This is a true Tachysphewx of rather slender build, the ante- 
rior femora of the male being emarginate, though not as 
strongly as in some species, and the tarsal comb of the female 
very long. The dark fuscous wings distinguish it from other 
black South-African Tachysphee. 
Tachysphex marshall, sp. n. 
@. Nigra; mandibulis basi, clypeo, flagello articulis tribus basalibus, 
tegulis, segmento abdominali sexto, femoribus, tibiis tarsisque 
rufo-testaceis ; alis fusco-violaceis, venis nigris; fronte, clypeoque 
basi aureo-pubescentibus. 
d. Feminz similis; flagello nigro; segmento dorsali sexto nigro, 
septimo rufo-testaceo. 
Long., 2 15, ¢ 11 mm. 
?. Clypeus broadly subtruncate at the apex, with two 
minute teeth at the apical angles, shining and sparsely punc- 
tured. Eyes separated on the vertex by a distance not quite 
equal to the length of the second joint of the flagellum. 
Thorax very finely and closely punctured ; median segment 
a little longer than the mesonotum, finely longitudinally 
rugulose, with short striz at the extreme base; the surface 
of the apical truncation strongly transversely striated, with a 
deep median sulcus. Abdomen microscopically punctured ; 
the pygidial area lanceolate, pointed at the apex, with small 
scattered punctures. Radial cell rounded at the apex ; second 
abscissa of the radius longer than the third; the space be- 
tween the recurrent nervures on the cubitus equal to the third 
abscissa of the radius. ‘l'arsal comb long ; eight spines on 
the fore metatarsus. 
6. Eyes separated on the vertex by a distance equal to the 
combined length of the two basal joints of the flagellum ; 
dorsal surface of the median segment coriaceous ; anterior 
femora emarginate at the base ; tarsal comb much shorter 
than in the female ; seventh tergite subtruncate at the apex ; 
eighth sternite widely emarginate, the angles forming 
spines. . 
Hab. Salisbury, Mashonaland (G. A. K. Marshall), Apvil. 
A variety with the apical segment in both sexes black, and 
