26 ME. p. CAMERON OS THE [May 7, 



side ; the black band between these marks triangularly projects 

 in the middle ; two larger black marks, not projecting at the 

 sides, are on the fifth segment ; the sixth is entirely black. 



The male is similarly coloured to the female, except that the 

 black marks on the clypeus are much smaller, the yellow line on 

 the scutellum is narrower and is interrupted in the middle, the 

 abdominal segments have only their apices narrowly black, and 

 the marks on the 2nd, 3rd, and 4th segments are much narrower ; 

 the last segment is yellow, black round the edges, and more 

 broadly and irregularly at the base, where the black band projects 

 broadly in the middle. The 8th, 9th, and 10th joints project and 

 are minutely spined below ; the 11th and 12th joints are broadly 

 hollowed, smooth, bare, and brownish below ; the last has the apex 

 obliquely rounded. The anterior tarsi are broader than usual ; 

 the metatarsus is of almost uniform width and has its lower edge 

 slightly irregularly waved ; the 2nd joint is not much narrowed 

 at the base ; the 3rd and 4th become gradually wider towards the 

 apex ; the middle femora are irregularly, minutely, and closely 

 spined or serrate on the lower edge, the outer two serrations are 

 wider, more regularly rounded than the others. The spine on the 

 2nd ventral segment is large, becooies gradually wider from the 

 base to the top ; its apex has an oblique slope ; on the penultimate 

 segment is a distinct rounded tubercle. 



A distinct species related to B. pinguis and B. latitarsis.~\ 



BeMBEX MELANCHOLICA Sm. 



Except that the yellow lines on the mesonotum are indistinct 

 and very short, an example from Singapore agrees very well with 

 the description of this species. In the male the incised apex of 

 the last abdominal segment is a characteristic feature. 



[Bembex boeneana, sp. n. 



Long. 22 mm. S • 



Hah. Borneo. 



This species has the pale lacteous colour of B. melancliolica, and 

 is closely related to it ; but it may be at once separated by the fact 

 that the last abdominal segment is not incised in the middle. 



Antennae black ; the scape yellow below ; the apical two joints 

 are hoUoAved below ; the last has its apex obliquely truncated and 

 is broadly, roundly incised ; the 12th is more obliquely and 

 slightly incised; the 11th is obliquely narrowed at the base; the 

 10th is slightly spinose in the middle ; the 9th is sharply spinose ; 

 the 8th has a less distinct spine. Head thickly covered with long, 

 soft, white hair; black, the inner orbits to near the top, the 

 clypeus, labrum, and mandibles, except at the apex, livid yellow ; 

 below the antennae are two black marks, longer than broad, 

 rounded above, obliquely narrowed on the inner side. Mesonotum 

 black ; an interrupted U-shaped yellow mark in its centre, and 

 there is a wider line alongside the tegulse. Scutellum black, 

 yellow round the apex ; postscutellum for the greater part yellow. 

 Median segment yellow ; a somewhat triangular black mark on 



