Hymenoptera in the British Museum. 81 



fourth; eyes separated on the vertex by a distance slightly less 

 than the length of the second joint of the flagellum. Head strongly 

 rugosely punctured, less coarsely on the vertex than on the front, 

 the median frontal carina not nearly reaching the anterior ocellus, 

 the lateral carinae curved, not straight, and meeting above the 

 anterior ocellus. Pronotum rather long, narrowed anteriorly, 

 sparsely punctured, produced posteriorly into a low tubercle, with 

 a median sulcus reaching to the base of the tubercle, the anterior 

 half of the sulcus with a few short transverse striae. Mesonotum 

 and scutellum smooth, with a few scattered punctures. Median 

 segment broader in the middle than long, the third carina in the 

 middle as far from the fourth as from the second ; the tubercles 

 at the apical angles elongate triangular, not curved. Second 

 dorsal segment at least one-quarter longer than the breadth in the 

 middle, the sides not strongly convex; the three apical segments 

 very strongly compressed laterally. Hind tibiae very sparsely 

 pimctured; fifth joint of the tarsi inserted at the base of the 

 fourth, the latter not reaching the middle of the fifth joint. Length 

 of the radius beyond the third cubital nervure less than half of 

 the length of the second transverse cubital nervure. Three cubital 

 cells. 



Hah. Nyasaland, Kondowi, Lower Nyika {R. Craw- 

 shay), June. 



In the compression of the apical segments of the abdo- 

 men this species resembles A. sihirica, Fabr. {comjjressi- 

 ventris, Guer.) ; but in neuration is close to assimilis, Kohl., 

 which, however, differs much in sculpture and other 

 points. 



Ampulex kristenseni, sp. n. 



$. Viridi-cyanea; clypeo antennisque nigris ; tarsis fuscis; man- 

 dibulis, tibiis anticis, femoribusque ferrugineis; alls hyalinis, venis 

 nigris, cellula radiali leviter infuscata. 



Long. 16 mm. 



$. Clypeus strongly convex, porrect, the carina not produced 

 into a tooth at the apex. Second joint of the flagellum as long as 

 the third and fourth combined; eyes separated on the vertex by 

 a distance scarcely exceeding the length of the second joint of the 

 flagellum. Head rugosely punctured, the median frontal carina 

 very short, not nearly reaching the anterior ocellus, the lateral 

 frontal carinae well developed. Pronotum shining, feebly and 

 irregularly transversely striated, with a median sulcus on the 

 anterior portion, raised into a tubercle at the apex. Mesonotum 



TRANS. ENT. SOC. LOND. 1917. — PART I. (NOV.) U 



