'Sir. R. E. Turner on Fossorial Hymen&ptera. 533 



LXTTI. — Notes on Fossorial Hi/menoptera. — XI. 

 By Rowland E. Tukner, F.Z.S., F.E.S. 



On some new Australian and Austro-Malayan Thynnidse. 



The following species were received among others from 

 Dr. E. Han:ilyn-Harris, of the Brisbane Museum, Mr. W. 

 W. Froggatt, and Mr. G. A. Waterhouse. The types of all 

 are in the British Museum. 



Rhagigaster aruensis, sp. n. 



$ . Nigra, subnitida, punctata ; antennis pedibusque fusco-ferru- 



giiieis ; segmento mediano obliquo, subconcavo. 

 S. Niger, albido-pilosus ; pedibus fusco-ferrugineis, coxis nigris; 



alis fiisco-hyalinis, purpureo tinctis. 

 Long., 58, d l-A mm. 



? . Head moderately convex, subrectangular, slightly 

 rounded at the posterior angles, distinctly longer than 

 broad, finely and sparsely punctured, the front more closely 

 and coarsely punctured and thinly clothed with short fulvous 

 hairs, a short median sulcus on the front, a sulcus on each 

 side converging very slightly posteriorly, reaching from the 

 eye to the posterior margin of tfie head. Pronotum scarcely 

 more than half as long as the head, broadly rounded 

 anteriorly, narrower than the head, as broad posteriorly as 

 long, the Avhole thorax very sparsely punctured. Median 

 segment oblique from just behind the scutellum, subconcave. 

 Abdomen more closely punctured, the first segment shorter 

 than the second^ vertically truncate at the base ; second 

 dorsal segment with a depressed transverse line at the base ; 

 sixth dorsal segment with a distinct pygidial area, almost 

 pointed at the apex. 



cj . Clypeus rather sparsely punctured, with a carina from 

 the base not reaching the apex, which is feebly triangularly 

 depressed in the middle, the apical margin truncate. Front 

 rugose, vertex strongly punctured ; the interantennal pro- 

 minence broadly rounded at the apex, with marginal carinas 

 which join a transverse carina not quite extending to the 

 eyes. Antennas about as long as the thorax and median 

 segment combined, not very stout, the apical joints very 

 slightly arcuate beneath. Anterior margin of the pronotum 

 straight and strongly raised. The whole thorax deeply and 

 closely punctured ; scutellum broadly rounded or sub- 

 truncate at the apex. Abdomen more shallowly punctured 



