Mr. E,. E. Tumer on Fossorial Hymenoptera. 543 



? . Fusco-ferruginous, more or less stained with black, 

 especially on the apical abdominal segments. 



Head closely and not very finely punctured, broader ante- 

 riorly than long, much narrowed posteriorly, the antennge 

 inserted far apart^ the front produced between them and 

 subtuberculate on each side. Pronotum convex, distinctly 

 margined laterally, nearly hal£ as long again as the greatest 

 breadth ; scutellum longer than broad ; dorsal surface of the 

 median segment about half as long as the pronotum, very 

 sparsely punctured. Second dorsal segment coarsely trans- 

 versely rugulose, with a transverse carina near the base and 

 another at the apex; the dorsal segments punctured, more 

 closely on the apical segments. Sixth dorsal segment with a 

 carina from the base almost reaching the apex, not com- 

 pressed, rounded at the apex, the edges of the ventral segment 

 produced upwards and forming marginal carinai along the 

 apical half of the dorsal segment. 



Length 9 mm. 



Hah. Eaglehawdc Neck ; February. Ferntree, Mt. Wel- 

 lington ; January. 



Both sexes are very near P. moniUcornis , but the male 

 differs in the presence of yellow markings, in the colour of 

 the legs, in the absence of a carina at the base of the clypeus, 

 and in the greater development of the spines on the hypo- 

 pygium. The female differs in the longer pronotum, which 

 is also subcarinate longitudinally on the posterior half in 

 moniUcornis, also in the margins of the sixth ventral 

 segment. These differences I think are specific, though the 

 species are very closely related. 



P sammothynmis depressus, Westw. 

 Thynnus {Agriomyia') depressus, "VVestw. Arc. Ent. ii. p, 107 (1844), 



There is a specimen of this species in the British Museum 

 taken by Commander Walker at Hobart. The type was 

 taken at Albany, W.A. 



Genus AsTHENOTHYNNUS, Turn. 

 Key to the Tasmaman Species. 



Legs and abdomen black marked witL pale j'el- 

 low ; hypopygiiim slightly broadened from 

 the base and truncate at the apex, with a 

 median spine A, icesticoodi, Giier. 



