466 Mr. \{. l'j. Turner on Fossorial llymenoptera. 



transversely striate, the str!a3 very feebly arched. Abdomen 

 almost smooth, finely aciculate, the basal segment distinctly 

 broader than long, with a few scattered punctures ; sixth 

 tergite stronglv narrowed from the base to near the middle, 

 thence narrowly produced with almost parallel sides and 

 narrowly rounded at the apex. Sixth sternite deeply tri- 

 angularly emarginate at the apex, with tufts of golden hairs 

 springing from just beneath the apical angles, the sixth 

 tergite margined laterally with golden hairs, springing from 

 beneath the segment. 



<$ . Mandibles with a blunt ill-defined tooth near the 

 middle of the inner margin ; clypeus and front minutely 

 punctured, sparsely clothed with short sericeous pubescence ; 

 the clypeus longer than broad, narrowed anteriorly, the 

 apical margin with three obtuse teeth. Antenuse inserted 

 nearly as far from the base of the clypeus as from the 

 anterior ocellus ; second joint of the flagellum 'twice as long 

 as the first. First termite broader than long; sixth sternite 

 with an acute spine and a tuft of long golden hairs at the 

 apical angles ; seventh sternite shallowly emarginate at the 

 apex ; seventh tergite parallel-sided, truncate at the apex, 

 lialf as long again as broad. 



Hub Kaf'u River, near Hoima-Kampala Road, Uganda 

 Protectorate, 3500 it. {S. A. Kerne), December 29-31, 1911, 

 2 ? V ; Siroko River, near W. foot of Mt. Elgon, 3000 ft. 

 Uganda Protectorate {S. A. Neave), Aug. 1.2-14, 1911, l<$ . 



Very near C. diodonta, Sehlett., though differing much 

 in eolour. The structural points in both sexes correspond 

 closely, but the striation of the basal area of the median 

 segment is more oblique in diodonta and the puncturation 

 of the second tergite is quite^ distinct, not obsolete as in the 

 present species ; the second tergite is also broader in 

 diodonta, being rather sharply broadened just behind the 

 base. 



Cerceris sodalis, sp. n. 



? £ . Very close to C. bagandarum and practically identi- 

 cal with that species in the structure, colour, and sculpture of 

 the head, thorax, and median segment, the female, however, 

 has the posterior margin of the pronotum and the post- 

 scutellum yellow. The colour of the abdomen is ferruginous 

 in both sexes, the sternites at the base and the middle of the 

 second tergite black ; the first tergite with a narrow apical 

 band, second very broadly at the sides and narrowly at the 

 apex, tergites 3-5 in the female and 3-0 in the male rather 



