Mr. R. E. Turner on Fossorial Ilymenoptera. 293 



Hemipepsis (Tetraodontonyx) titan, sp. n. 



9 . Nigra ; alls nigro-caeruleis. 

 <5 . Feminae similis. 

 Long., 5 34-40 mm., 3 30 mm. 



? . Clypeus broadly and sliallowly emarginate, labrum 

 rounded at the apex. Eyes separated on the vertex by a 

 distance very slightly exceeding the length of the second 

 joint of the rlagellnm ; posterior ocelli nearer to each other 

 than to the eyes. Antennas stout; vertex somewhat swollen 

 behind the ocelli. Pronotum rounded anteriorly, very 

 broadly arched posteriorly ; mesonotum longitudinally sub- 

 carinate in the middle on the posterior half ; scutellum 

 and postscutellum moderately convex. Median segment 

 short, without lateral tubercles at the base, coarsely trans- 

 versely striated ; the posterior truncation almost vertical, 

 its surface smooth on the apical half ; the dorsal surface 

 distinctly convex. Sixth tergite clothed with black hairs ; 

 transverse groove of the second sternite situated distinctly 

 behind the middle of the segment. Basal joint of the fore 

 tarsi with a comb of short stout spines ; hind tibiae with a 

 well-defined ridge above, on which are a few small spines, 

 not serrate. Calcaria of the hind tibiae exceeding one-third 

 of the length of the basal joint of the hind tarsi. Tarsal 

 joints strongly spinose beneath ; tarsal ungues with four 

 teeth and with a comb of long seta?. 



<$ . Clypeus longer and narrower than in the female, 

 second joint of the flagellum much shorter, very little longer 

 than the third. Hind tibiae and tarsi clothed rather densely 

 with very short black hairs, the tarsal joints somewhat 

 flattened ; the ungues without a comb of long setae. Post- 

 scutellum more strongly convex than in the female, almost 

 subtuberculate. Groove of the second sternite shallow, 

 situated near the base. Neuration as in Hemipepsis; radial 

 cell broadly truncate at the apex ; second recurrent nervure 

 received at one-third from the base of the third cubital cell, 

 very feebly curved. 



Hab. Mlanje, Nyasaland (S. A. Neave), November and 

 Januax'y ; N.E. Rhodesia, between Fort Jameson and 

 Lundazi, 4000 ft. (S. A. Neave), June; Portuguese East 

 Africa, JJim River (C. F. M. Swynnerton), December ; 

 Uganda, Mt. Maroto, 3700 ft. (W. P. Lowe), January ; 

 British East Africa, Crater Lake, N.W. of Meru, 5700 ft. 

 (S. A. Neave), February. 



