16 Cameron, Hymenoptera Orientalia, 



Hab. Borneo. 



Antennae black ; the flagellum almost bare ; the scape 

 thickly covered with blackish hairs, and piceous in the 

 middle beneath. Head shining, sparsely covered with 

 long fuscous hairs ; below the antennae bearing all over 

 except in the middle, where there is a smooth space, 

 moderately large punctures ; the front and vertex very 

 smooth and shining, except for a few small punctures 

 along the inner orbits ; the mandibles ferruginous, their 

 teeth black ; the palpi fuscous. Thorax entirely fer- 

 ruginous, smooth, shining, impunctate ; the middle 

 lobe of the mesonotum raised ; the median segment 

 sparsely covered with long black hairs ; on its side is 

 a deep wide furrow, which does not reach the base. 

 Wings uniformly deep smoky, but with a violaceous 

 tinge. The fore legs entirely ferruginous, as are also 

 the middle coxae, except that they are darker ; the four 

 anterior legs sparsely covered with short hair ; the hinder 

 tibiae and tarsi have the hair much longer and thicker. 

 The petiole above is smooth and shining, except the 

 apex in the middle, where it is a little rough ; the 

 middle part bounded by the keels is almost transverse, 

 and has behind it a small space bearing some minute 

 punctures ; the outer divisions at the apex are obliquely 

 truncated. The 2 — 4 segments are closely and strongly 

 longitudinally striolated, the striations on the second 

 being irregular ; in the centre of the second segment 

 are two keels, which unite in the middle and are con- 

 tinued to the apex as one ; from the base near the edge 

 runs another keel, which runs obliquely to the central 

 keel, when it becomes straight ; the sides are distinctly 

 margined above ; on the side of the second segment is 

 a large smooth, shining space ; and there is a similar 

 one, but smaller, on the third in front of the depression ; 

 the other segments are smooth and shining, the last is 



