54 Mr. 0. J. Gahan on new Longicorn 



distinguished by having a second tubercle on each side of the 

 prothorax and a dark brown spot and small tuft of hairs at 

 the extreme base of each elytron. It resembles C. plumicornis 

 in having three glabrous black lines on the vertex of the head. 



Crossotus basalt's, sp. n. 



Pube grisea dense vestitus ; prothorace lateraliter pone medium sat 

 valde tuberculato, disco utrinque tuberculis duobus parvis 

 instructs; elytria a basi ad medium fortiter subseriatim punc- 

 fcatis, interstitiis leviter costatis; corpore subtus cum pedibus 

 nigro vel fusco punctatis ; antennis ( S ) corpore longitudine 

 :i equalibus, subtus usque ad apicem sat dense fimbriatis, ($) 

 medium elytrorum vix superantibus, Bubtus versus basin dense, 

 versus apicem sparsissime ciliatis. 



Long. 0-10, lat. 4-4^ mm. 



Bab. Taru Desert and Voi, Brit. E.Africa (C. S. Betton). 



With a greyish pubescence, mottled in places with fulvous 

 brown, especially on the front of the head, on the legs and 

 underside. Prothorax with a distinct tubercle on each side 

 behind the middle, lying in front of which is another very 

 small tubercle ; disk with four small tubercles forming with 

 those of the sides two transverse series. Elytra strongly 

 punctured in somewhat irregular rows from the base to the 

 middle, beyond which some of the rows may be traced, but 

 with the punctures much smaller in size ; the intervals 

 between the rows of punctures slightly raised, and sometimes 

 covered with a brownish pubescence contrasting with the 

 grey colour of the rest of the surface ; each elytron with a 

 small tawny tuft of hairs near the base and another behind 

 the middle. Intercoxal process of presternum raised in a 

 simple arch ; that of the mesosternum truncate in front, with 

 its anterior lace almost vertical. 



Male. Antenna? about as long as the body, with a fringe 

 of hairs underneath which is pale grey in colour towards the 

 base, blackish brown towards the apex. 



Female. Antenna? scarcely reaching beyond the middle of 

 elytra, with the fringe of hairs underneath becoming gradually 

 thinner from the third to the sixth joint, and with the last 

 three or four joints very sparsely ciliatc underneath. 



Plectropygus, gen. nov. 



With the characters of the group Hecyridides of Lacordaire, 

 but distinguished from the other genera of this group as 

 follows : — Head as broad as the prothorax, the latter very 



