Mr. 11. E. Turner on Fossorial Hymenoptera. 49 



Subfamily Piiilantrinm. 

 Cerceris reprcesentans, sp. n. 



•§ . Nigra ; mandibulis, apice excepto, clypeo, facie lateribus latis- 

 sime, carina interantennali, orbitis extcrnis fascia angusta ad 

 marginem posteriorem capitis late producta, pronoto fascia inter- 

 rupta, tegulis, scutello macula magna utrinque, postscutello, seg- 

 mento mediano macula maxima utrinque, tergito prime- macula 

 magna utrinque, tergitis 2-5 fascia lata antice emarginata, coxis 

 posticis supra, trocbanteribus posticis, femoribus tibiisque subtus 

 flavis ; antennis, dimidio apicali supra infuscatis, femoribus 

 tibiisque supra tarsisque ferrugineo-testaceis ; area pygidiali 

 ferruginea ; sternitis 2-5 utrinque macula magna flava, quinto 

 sextoque testaceis ; alis subhyalinis, apice leviter infumatis, venis 

 ferrugineis. 



Long. 13 mm. 



$ . Mandibles with a large triangular tooth on the middle 

 of the inner margin, blunt at the apex. Clypeus with a 

 porrect lamella, which is free from the base, gradually nar- 

 rowed towards the truncate apex and nearly twice as long 

 as the apical breadth ; the portion of the clypeus below the 

 lamella short and transverse at the apex. Antennas inserted 

 about four times as far from the anterior ocellus as from the 

 base of the clypeus, interantennal carina well developed, 

 second joint of the flagellum half as long again as the third. 

 Head large, broader than the thorax, closely punctured, the 

 front with a tendency to longitudinal striation. Mesonotum 

 and scutellum irregularly longitudinally striate, punctured 

 between the stria? ; mesopleune closely punctured, not tuber- 

 culate. Median segment closely punctured ; the basal area 

 more or less strongly obliquely striated, with a low longi- 

 tudinal carina in the middle. First tergite broader than long, 

 second sternite without an elevated basal area; all the tergites 

 sparsely punctured, the sternites more finely punctured ; 

 pygidial area granulate, almost parallel-sided, only a little 

 narrowed at the base, nearly three times as long as the 

 greatest breadth. 



Hab. Masai Reserve, British East Africa, May 20, 19.13 

 (1\ J. Anderson). 2 ? $ . 



In colouring this approaches the European C. ferreri, 

 Lind., but is easily distinguished by the straight apex of the 

 lamella of the clypeus, the sparse sculpture of the abdomen, 

 the shape of the pygidial area, and the yellow spots on the 

 scutellum. It is not at all nearly related to any of the 

 Ethiopian species of this group described by Dr. Brauns. 



Ann. & J\r<xg. N. Hist. Ser. 9. Vol. iv. 4 



