.Mr. K. E. Turner on Fossorial Hymenoptera. 353 



of the postscutellum distinctly obliquely striated. Median 

 Begment roundly depressed posteriorly, not truncate, distinctly 

 transversely striated, will) a median sulcus from t lie base, 

 which becomes obsolete mar the apex. First tergite a little 

 longer than its apical breadth, very rapidly broadened from 

 the base ; transverse furrow of the second stern ite situated 

 near the base : sixth tergite closely punctured. Second 

 abscissa of the radius long, equal to the third, first recurrent 

 nervure received at three-quarters from the base ol the 

 second cubital eel!, second at the middle of the third cubital 

 cell; third transverse cubital nervure oblique. Cubitus of 

 hind wing received just beyond the transverse median nei vine. 

 Spines of the fore metatarsus very short ; hind tibia? almost 

 smooth; the spines microscopic. 



Hah. Mlanje, Nyasaland (S. A, Neave), January 1913. 



Very similar superficially to the common Cyphunony.c 

 optimus, Sin., but differs generically, also in the colour of 

 the flagellum. 



Pseud agenia esau, Kohl. 

 Pveudagenia cucat, Kohl, Revue Zool. Afric. iii. p. 200 (191oj. 



A form which I take to belong to this fine species occurs at 

 Mlanje, Nyasaland. It is entirely black, but otherwise 

 answers fairly well to the description. The antenna 1 are 

 shorter and stouter than is usual in the genus, not " tenues," 

 as in the description, and the position of the cubitus of the 

 hind wing is variable, sometimes interstitial as in Kohl's 

 type, sometimes originating distinctly beyond the transverse 

 median nervure. 



Genus CRYPTOSALIUS, Turn. 

 Cryptosalius, Turn. Traus. Ent. Soc. London, p. 76 (1917). 



Allied to the Indian species typical of this genus are 

 several African species which may conveniently be included 

 in the genus. 



1. Cryptosalius robustus, Cam. 

 Pseudayvnia robusta, Cam. Ilec. Albany Museum, i. p. 130 (1904). $ . 



In structure this is closely allied to (.'. rava, Bingh., the 

 type of the genus, differing in the shorter inner branch of the 

 bifid tarsal ungues, in the arcuate hind margin of the pro- 

 notum, and in the lesser development of the frontal promi- 

 nence above the base of the antennae, but agreeing in the 



