438 Mr. R. E. Tmner on Fossorial Hy nienoptera. 



Bemhex albidula, sp. n. 



S . Niger ; abdomine caeruleo-tincto ; mandibulis, apice excepto, 

 labro, clypeo macula magna basali nigra iitrinque, scapo subtus, 

 orbitis. macula parva utrinque sub ocellis, prosterno, callis 

 humeralibus apice, segmento mediano augulis posticis, segmentis 

 dorsalibus 2-1 fascia late interrupts, prime macula magna 

 utrinque, quinto fascia angusbe interrupta, sexto linea transversa 

 utrinque, segmentis ventralibus secundo tertioque macula parva 

 utrinque, femoribus anticis intermediisque subtus, tibiis supra 

 uigro-lineatis, tarsisque anticis intus albidis ; alis byalinis, venis 

 fuscis, anticse latitudine thoracis duple et dimidium longiores. 

 Long. 22 mm. 



^ . Eyes distinctly divergent towards the clypeus ; labruui 

 flattened, clypeus convex; carina between the antennaj very 

 low. Antenuee almost normal; eighth joint of the flagellum 

 with two very minute spines beneath ; ninth with a minute 

 spine near the base ; apical joint slightly curved, rounded at 

 the apex, longer than the penultimate. Fore tarsi mode- 

 rately stout, the joints not dilated ; the basal joint with seven 

 spines, the basal spine small. Fore and intermediate femora 

 unarmed, intermediate tarsi simple, intermediate tibiaa not 

 ])roduced at the apex and without a long apical spur. 

 Seventh dorsal segment subtriangular, narrowly rounded at 

 the apex, closely punctured at the base, sparsely at the apex. 

 Second ventral segment with a small tubercle near the apex ; 

 sixth produced into a stout blunt tooth at the apex ; seventh 

 unarmed, without carinas ; eighth in the form of an acute 

 spine. Median cell of the hind wing emitting two veins from 

 the apex. 



Hub. Sierra Leone, Mussaia (/. J. Simpson), April. 



This fine species is somewhat intermediate between diversi- 

 pennis and monedula, but seems to belong to the group of the 

 latter, though distinguished from it by the spines on the 

 eighth and ninth joints of the flagellum, and by the mucli 

 narrower seventh dorsal segment. Handlirsch, in giving the 

 distinguishing characters of the group, says " Mittelscheidcel 

 gezahnt,''^ but in describing the species says " femoribus inter- 

 mediis infra non dentatis." The latter statement is correct. 



B. ugandensis, Turn., is also near this species, but differs 

 in the structure of the antennas, the hollow grooves beneatii 

 the three apical joints being well marked in ugandensis and 

 almost obsolete in the present species, the spines on the other 

 joints are also different. The colour-ditferences, though 

 o-i-eat and apparently constant locally, cannot alone be relied 

 on in this group. 



