1910.] FOSSORIAL WASPS OF AUSTRALIA. 319 



Median segment more than half as long as the breadth at the base, 

 slightly narrowed posteriorly, with a large tubercle on each side 

 near the base, very steeply sloped posteriorly, with an indistinct 

 median sulcus and a few obscure striae near the apex. Apical 

 segment of the abdomen subtriangular, very narrowly rounded 

 at the apex, and clothed with fulvous pubescence. Posterior 

 tibiae spined and slightly serrate ; spines of the anterior tarsi 

 short. Tarsal ungues long and slender, with one small tooth 

 before the middle of the inner margin, not bifid. Radial cell 

 rounded at the apex ; second abscissa of the radius shorter than 

 the third ; first recurrent nervure received at two-thirds from the 

 base of the second cubital cell, second before the middle of the 

 third cubital. Cubitus of hind wing interstitial with the trans- 

 verse median nervure. Orange ferruginous ; sternum, pleura?, 

 scutellum, postscutellum, median segment, first abdominal seg- 

 ment, coxae, trochanters, and the base of the femora black. Wings 

 flavo-hyaline stained with black at the base and narrowly margined 

 with fuscous at the apex. 



Length 29 mm. 



cJ . Olypeus longer than broad ; posterior tibiae with short 

 spines, not serrate ; vertex black. Otherwise as in the female. 



Length 14-17 mm. 



Hob. Port Darwin {Turner). November. 1 $ , 2 tf . 



Nearest to C. tuberculatus Sm., but the antennae and legs are 

 much longer, and the mesonotum is not black as in that species. 



Cryptocheilus pulvidorsalis, sp. n. 



2 . Olypeus short, three times as broad at the base as long, 

 very sparsely punctured, the apical margin very feebly and widely 

 emarginate, almost transverse ; thelabrum slightly exposed. Eyes 

 very slightly convergent towards the vertex ; posterior ocelli rather 

 far apart, almost as far from each other as from the eves. 

 Antennae moderately long, not very slender ; the second joint of 

 the flagellum about half as long again as the third. Head and 

 thorax smooth, subopaque, a short frontal sulcus not reaching the 

 anterior ocellus. Pronotum rounded at the anterior angles, about 

 half as long as the mesonotum, with a delicate, impressed, longi- 

 tudinal line on the middle. Median segment twice as broad as 

 long, steeply sloped posteriorly, transversely striated, more finely 

 on the dorsal surface than on the posterior slope ; a blunt, low 

 tubercle on each side near the base. Abdomen a little longer than 

 the head and thorax combined, slightly pruinose. Posterior tibia? 

 serrate ; tarsal ungues with one tooth, not bifid ; legs of moderate 

 length. Radial cell bluntly rounded at the apex, second abscissa 

 of the radius much shorter than the third, second cubital cell 

 receiving the first recurrent nervure at about one-third from the 

 apex, third receiving the second recurrent nervure just before the 

 middle ; submediam cell much longer than the median ; cubitus 

 of the hind wing originating just beyond the transverse median 

 nervure. 



