( 149 ) 



Hah. Benito, French Congo {t>/pe), LeopolJville and Upoto, Congo. 



Two c?(?, three ? ?. 



The evenly coloured body, the smooth frons of the head, the nou-granulose and 

 apically rounded elytra, and the yellow-margined scutellum, will be sufficiently 

 trenchant characters by which to recognise the species. 



39. Monochamus cribellum spec. nov. 



<?. Rnfons brown, covered with a clayish buff tomentnm, which is greyish 

 beneath. Head, prothorax above and below, elytra and sides of meso-metasternum 

 very densely and very coarsely punctured all over, the punctures black and brown, 

 giving the body an irrorated appearance. Lower lobe of eye vertical, small, not so 

 wide as cheek. Antenna not quite twice the length of the body, distal segments 

 black, scape very short, twice as long as broad (measured from basal constriction to 

 apex), third segment twice the length of the scape and a third longer than fourth. 

 Protliorax without sharply marked subapical sulcus above ; side-spine before 

 middle, acute ; a rather high mesial postmedian tubercle. Scutellum buff, rounded. 

 Elytra parallel, rather strongly convex before apex, somewhat granulated at base, 

 obIi(inely rounded at apex, non-truncate, punctures large and close together from 

 the base to the very apex, each bearing a very short stiff hair. Femora smooth. 

 Mesosternal process narrow, declivous. 



Length, 7 mm. 



Ilab. Batanga, Cameroons. 



One c?. 



More coarsely punctured than crihrosus (1893) Lameere, of which the type 

 is in the Tring Bluseum. M. cribellum is a much slenderer insect than crihrosus, 

 and can easily be distinguished by the small eye, the punctured sides of the 

 mesometasternum, the non-seriated punctures of the elytra, etc. 



40. Monochamus aurigutta spec. nov. 



(??. Brown-black, tiliiae and antenna (scape excepted) more rufous brown; 

 uniformly covered with a very short slat3'-grey pubescence. Pronotum with a 

 consjiicnous golden-yellow spot at each side of base. Elytra marked each with 

 a single, postmedian, discal, transversely rounded, velvet3'-black spot. Bases of 

 antennal segments grey. 



Head and pronotum densely punctured, excepting the three dorsal thoracical 

 callosities, which are feebly raised. Mesial line of frons feebly impressed ; eye 

 about as wide as cheek. Antenna two and a half times (c?) or twice (?) as 

 long as the body ; scape long, finely punctured. Prothorax as long as broad ; 

 mesial callosity grooved behind ; side-spine large. Elytra truncate at base, not 

 rounded at shoulder, somewliat imi^ressed behind base, gradually narrowed from 

 shoulder to near apex, strongly convex behind, punctured from base to apex, the 

 punctures large in Ijasal half, gradually becoming smaller behind, but remaining 

 distinct to tlie very end, subseriate, especially at base ; four series of jiunctnres 

 Ijctween suture and basal callosity, which bears granules that are as prominent 

 as those on and Ijehind the shimlder ; the anterior edges of all the punctures of 

 basal half more (U' less elevate ; apices of elytra rounded together, the sutural 

 angles distinct. Femora smooth, without jmnctures. 



Length, 12 — 14 nun. ; elytra, 8 — lO mm. ; breadth, 4 — 5 mm. 



