AUSTRALIAN FOSSORIAL WASPS. 47 



striated. Intermediate tibise swollen, basal joint of intermediate 

 tarsi not broadened. A tuft of golden hairs on each side of the 

 pygiclium. 



Hab. Cunderdin, W. Australia, 80 miles east of Perth 

 {Mrs. Lundy). December to January. $ 2 in C0 P- 



Closely allied to C. assimilis Sm., from which the male differs 

 in the shape of the interantennal prominence, which is pointed in 

 assimilis, in the more prominent angles of the pronotum and in 

 the narrower hypopygium, as well as in the much greater extent 

 of the yellow colour. On the abdomen the colour is light orange 

 rather than yellow. 



The female differs from assimilis (described by Smith etsjlavo- 

 fasciatus) in the greater extent of the yellow colour, in the much 

 greater width of the furrow before the apical carina of the 

 second dorsal segment, and in the same difference on the first 

 dorsal segment. The form of the pygidium is almost identical in 

 the two species. C. assimilis occurs at Perth and also at Southern 

 Cross, Cunderdin being about halfway between the two localities, 

 so that this is not likely to be merely a subspecies. 



Elidothynnus fumatipennis, sp. n. 



c$ . Niger; mandibulis, apice excepto, clypeo, margine in- 

 teriore oculorum angustissime usque ad basin antennarum, 

 lineaque pone oculos flavis ; alis fuscis, apice subhyalinis. 



2 . Nigra, albopilosa ; capite nitido, pygidio pilis longissimis 

 instructo ; mandibulis f usco-ferrugineis. 



Long., d 1 26 mm. ; $ 12 mm. 



c? . Clypeus broadly truncate at the apex ; interantennal pro- 

 minence almost pointed at the apex, connected by a carina with 

 the base of the clypeus ; head and thorax closely punctured, 

 scutellum and abdomen rather more sparsely punctured, median 

 segment very closely and finely punctured. Prothorax produced 

 into acute angles at the sides ; median segment short and broad, 

 thinly clothed with white pubescence ; sides of the abdomen 

 almost parallel. Seventh dorsal segment with curved stria?, not 

 produced into a lamella; hypopygium triangular, with an 

 apical spine, the basal angles produced into strong blunt teeth. 

 Second abscissa of the radius as long as the third, second and 

 first recurrent nervures received at almost equal distances from 

 the second transverse cubital nervure. 



2 . Head fully half as broad again as long, very slightly con- 

 vex, with a few large punctures on the front, the remainder of 

 the head shining, with a few scattered punctures. Thorax and 

 median segment sparsely punctured and thinly clothed with long 

 white hairs ; the pronotum nearly twice as broad as long, very 

 slightly narrowed posteriorly ; scutellum broad, no longer than 

 the dorsal surface of the median segment. Basal half of the 

 first abdominal segment raised above the apical portion and 

 deeply emarginate in the middle posteriorly, sparsely punctured 



