Hymenoptera Or tent a lis. 251 



either side in a blunt tooth, the teeth forming with the 

 apical point a triangle. Eyes almost parallel. Ocelli not 

 forming a triangle, the hinder separated from the eyes 

 by the length of the second and third antennal joints united ; 

 and from each other by not very much more than the 

 length of the second joint. The third antennal joint is 

 fully one half longer than the fourth, and not much shorter 

 than the first. There is a short blunt triangular tooth on 

 the hinder edge of the mesosternum. The punctuation of 

 the head is moderate ; on the thorax much coarser and 

 rugose ; the 'metanotum is rugose ; the triangular area on 

 the median segment is large, transversely striated, and 

 indistinctly furrowed down the middle. The pygidial area 

 is opaque, irregularly punctured ; twice broader at the 

 base than at the apex, the contraction taking place beyond 

 the middle ; the apex rounded, the sides punctured, the 

 hair fringe long, dense, and fulvous. Hypopygium finely 

 punctured, opaque ; the incision triangular, reaching a very 

 little beyond the middle. 



In the 6 the clypeus is equally convex, bluntly keeled in 

 the middle, the apex broadly rounded ; the triangular area 

 on the median segment is longitudinally striolate, the striae 

 wide apart ; the pygidial area is of equal width and is 

 punctured irregularly. 



In both sexes the petiole is wider than long, sparsely 

 punctured ; the sculpture on the other segments is weak 

 and becomes almost obsolete on the fifth segment. 



Cerceris Rothneyi, sp. nov. (PI. X., f. 3, a, b). 



Ferruginous, the vertex for the greater part black ; the 

 fourth and apical segments of abdomen dark piceous ; the 

 scape beneath, the cheeks, clypeus, basal half of mandibles, 

 tegulae, a line on the pronotum, tubercles, scutellum, meta- 

 notum, the base of second abdominal segment, the third 

 segment, except on semi-circular space at the base, the fifth 



