48 Mr. C. J. Galian on new Longicorn 



Hub. Voi, Brit. E. Africa (G. S. Betton). Two examples, 

 which appear to be females. 



In general shape this species resembles several species of 

 the genus Eunidia, to which, however, it is by no means 

 closely allied. 



Prosopocera marmorata, sp. n. 



Albido-cinereo pubescens ; elytris cinereo et brunneo-griseo mar- 

 moratis ; antennis ( <J ) articulia 3° 4°que crassis, griseis, articulis 

 5° ad 10"'" prope apicem fusco-annulatis ; processu frontali ( 6 ) 

 (interdum parvo vel nullo) antice concavo, versus apiuera cur- 

 vato, et ad apicem bifido. 



Long. 18-25, lat. 6—84 mm. 



Huh. Samburu, Brit. E. Africa (G. 8. Betton). 



Head, thorax, legs, and underside of body covered with an 

 ashy-white pubescence, which also forms numerous small 

 spots and one or two larger patches on the elytra. First 

 four joints of the antennas with a grey pube-cence, the third 

 and fourth having each a narrow glabrous fuscous ring near 

 the apex ; the joints from the fifth to the tenth are cinereous, 

 with a broad fuscous ring on each near the apex ; meso- 

 sternum very feebly tubercled. 



In the male the third and fourth joints of the antennae are 

 thickened ; the frontal process, which in small male specimens 

 is very small or even entirely wanting, reaches in large 

 specimens a length of about 3 millim.; it is concave and 

 densely hirsute in front, slightly curved upwards and deeply 

 notched at the extremity. 



In general structure this species most nearly approaches 

 P. Dejeani, Gah., and P. comifrons, Gah., but is readily 

 distinguishable by its coloration. 



PllOTOMOCERUS, gen. nov. 



Head with strongly raised and divergent antennary 

 tubercles, each of which is slightly emarginate at the apical 

 border, with a small projecting angle on the inner side. 

 Front of the head furnished with a cariniform tubercle in its 

 upper part in both sexes and with a similar tubercle in its 

 lower part in the female. In the male a large process pro- 

 jects obliquely downwards from the lower part of the front, 

 and towards its free end curves slightly forwards. Prothorax 

 furnished on each side with a large median conical tubercle, 

 preceded by two smaller and more obtuse tubercles, one of 

 which is close to the anterior margin ; pronotum feebly 



