AUSTRALIAN FOSSORIAL WASPS. 45 



PoGONOTHYNNUS FULVOHIRTUS, Sp. IX. (PI. I. figs. 5, 6.) 



<$ . Niger, albopilosus ; thorace supra fulvohirto ; mandibulis, 

 clypeo, lineaque pone oculos flavis ; alis hyalinis, leviter inf uscatis, 

 venis fuscis. 



$ . Nigra ; mandibulis f usco-ferrugineis ; flagello fusco ; pedi- 

 bus obscure f usco-ferrugineis ; segmento dorsali secundo trans- 

 verse sex-carinato ; segmento sexto contracto, apice late truncato. 



Long., <S 20 mm.; $ 12mm. 



J . Clypeus moderately convex, very broadly truncate at the 

 apex ; antenna? as long as the head, thorax, and median segment 

 combined, the interantennal prominence rounded at the apex 

 and connected by a carina with the base of the clypeus. Head 

 rugosely punctured, thinly covered above with fulvous pubescence ; 

 thorax closely and more finely punctured, the dorsal surface 

 thickly covered with long fulvous pubescence. Median segment 

 covered with long whitish pubescence, rounded, broader than 

 long. Abdomen shallowly punctured, the sides almost parallel, 

 except at the extremities ; sixth ventral segment with a short 

 spine on each side at the apical angles ; hypopygium broad at 

 the base, with a strong tooth on each side at the basal angles, 

 thence the sides converge sharply and are produced into a 

 process longer than broad, the sides of which diverge slightly 

 towards the apex, which is truncate at the base of the long and 

 slightly recurved apical spine. Second and third abscissa? of the 

 radius almost equal, second recurrent nervure received at one- 

 fourth from the base of the third cubital cell. 



2 . Clypeus without a carina ; head shining, with scattered 

 punctures, nearly twice as broad as long, very strongly rounded 

 posteriorly. Thorax shining, with scattered punctures ; the 

 pronotum nearly twice as broad as long, widely emarginate 

 anteriorly, with a row of punctures on the anterior margin, from 

 each of which springs a long hair ; scutellum broader than long. 

 Median segment very short, not more than half as long as the 

 scutellum. First dorsal segment strongly punctured at the base, 

 with one or two indistinct transverse striae before the strongly 

 raised apical margin ; second dorsal segment with six strong 

 transverse carina?, third and fourth segments very sparsely 

 punctured. Pygidium contracted at the base, then obliquely 

 truncate, the surface of the truncation ovate, the dorsal plate 

 covering only two-thirds of the surface of the truncation and 

 broadly truncate at the apex, two arched carina? at the base of 

 the truncation . Fifth ventral segment coarsely obliquely striated. 

 Intermediate tibia? very stout ; basal joint of intermediate tarsi 

 moderately broadened. 



Hab. Yallingup, S.W. Australia; October to December. 



This is near P. morosus Sm., from which the male differs in the 

 colour of the pubescence on the head and thorax and the slightly 

 narrower process of the hypopygium. In both species the seventh 

 dorsal segment is produced into a flat rugulose lamella. The 

 female of morosus is unknown, but the female of the closely 



