STUDIES IN THE FOSSORIAL AVASPS. 705 



the eyes as from each other. Pronotum nearly as broad as the 

 head, widely emarginate anteriorly ; scutellum with a large 

 triangular rugose area from the base to the narrowly truncated 

 apex-, the sides smooth and opaque. Postscutellum and median 

 segment smooth and opaque, a few large punctures on the middle 

 of the postscutellum ; median segment raised towards the median 

 line, with a narrow margined median groove, the posterior trunca- 

 tion of the segment coarsely but shallowly punctured, the sides of 

 the segment closely obliquely striated. Abdomen shining, finely 

 and very sparsely punctured, the punctures larger on the ventral 

 than on the dorsal surface, and rather closer at the apex of the 

 segments than at the base ; the apical dorsal segment broadly 

 rounded, and longitudinally punctured- sttiate. Second abscissa 

 of the i-adius a little shorter than the third ; first recurrent 

 nervui'e received beyond the middle of the second cubital cell, 

 second at two-thirds from the base of the third cubital cell. 

 Radial cell detached from the cOsta for about half its length. 



Hah. British East Africa, Makindu, 3300 ft. {S. A." Reave); 

 April 5-7, 1911 {A.E.B. 0.). 



This fine species does not seem to be very neal*ly allied to any 

 other, being well distinguished from the rvjlceps group by the 

 very coarse sculpture of the head and thorax. The basal joint of 

 the posterior tarsi is furnished with a closely-set comb of small 

 spines beneath. 



The description of Cosila donaldsoni Fox corresponds rathei* 

 closely to this species-, but the clypeus is tridentate on the apical 

 margin, not rounded, with indistinct teeth as in the present 

 species, and 1 think Fox was too careful a worker to have con- 

 fused the genera. 



EIlis (Mesa) aueiplua, sp. n-. 



$ . Nigra ; mandibulis basi, pron'ot'O; meson'oto scuieUoque rufo-^ 

 ferriigineis-; alls infuscatis. 

 Loti'g: 12 mm-. 



$ . Head and pronotum closely and rather strongly punctured ; 

 mesonotum and scutellum much more sparsely punctured, smooth 

 In the middle > pleurise coarsely punctured ; median segment finely 

 and closely punctured^ the median groove harrow and shallow, 

 margined by low cai-inse, the posterior truncation more shallowly 

 punctured. Abdomen father closely and not very finely puhctured, 

 the apical segment closely longitudinally striated-. Sides of the 

 median segment obliquely striated. Clypeus tl-ansverse at the 

 apex. Eyes vefy feebly and widely emarginate on the inner 

 margin; posterior ocelli further from the eyes than from each 

 other. Head more than half as broad again as long, broader than 

 the thorax. PronotUm shoft, not as long in the middle as the 

 scutelhiih, the anterior margin straight, the posterior margin 

 widely arched. Pubescence sparse and whitish, calcaria whitislu 

 Radial cell only separated from the costa at the apex, which is 

 ■subtruncate ■; first abscissa of the radius as long as the second^ 



