Mr. R. E. Tinner on Fossorial Ilymenoptera. 339 



glnous colour at the base of the abdomen, whereas in speci- 

 mens of discolor from Biskra the two basal sej^ments are 

 usually dull ferruiirinous. I tiiiuk the two forms must be 

 considered specitically distinct. 



Lf^'ig-j c? ?5 Vl-lh mm. 



llah. Lower Luan<rvva River, N. E. Rhodesia; Karonga, 

 Lake Nyasa (5, A. Neave). 



The male is the type. The species was submitted to 

 Herr Kohl, who pointed out the afJinity with discolor. 

 S. discolor, Haudl., ranges eastward as far as Karachi, where 

 one male was collected by Mr. Comber. 



Stizus coffer, Sauss. 



Stizus caffer, Sauss. Mt5langes hj'nK^nopt. p. 28 (1855). 5 . 



As Handlirsch suspected, the male shows that this species 

 should be grouped with haplocerns, Handl., and not with 

 loriculatus, Sm. The male caffer is very similar to the 

 female, the antennae are without spines, the apical joint no 

 longer than the penultimate and slightly curved. Posterior 

 angles of the median segment widely excised. 



Stizus oxydorcus, Ilandl. Verb, zool.-bot. Ges. "Wien, 1. p. 472 (1900). 



Stizus oxydorcus^ Handl. 

 landl. Verb, zool.-bot. Ges. V 



Hah. Bothaville (Bi-auus) ; Buluwayo {G. A. K. Jfar- 

 shall). 



The male differs much more from clavicornis, Handl., than 

 the female. Tiiere is no sexual difference in the antennse ; 

 the eyes are more strongly convergent than in the female. 

 The prominent tooth on the second ventral segment, which is 

 characteristic of clavicornis, is entirely absent in oxydorcus ; 

 the seventh ventral segment is similar to that of clavicornis, 

 but the lateral carinre are produced into more prominent 

 teeth. 



Stizus escalerce, sp. n. 



J . Stizo clavicorni affinis ; niger, flagello antenuarum subtus 

 ferrugineo; pedibus pallide fiavis, testaceo-variegatis ; man- 

 dibulis basi, clypeo, fronte sub antennis, scapo, pronoto postice, 

 callis humeralibus, mesopleuris fascia lata antice, segmentis 

 dorsalibus 1-7 fascia lata apicali, prima late emarginata, 2-5 

 antice bisinuatis, sexta septimaque aiiguste interruptis, segmento 

 ventrali secundo dimidio apicali, tertio quartoque fascia apicali 

 bisinuata, quinto fascia interrupta pallide tlavidulis ; alis byalinis, 

 venis ferrugiiieis. 



Long. 12 mm. 



