538 Mr. R. E. Turner on Fossorial Tlymenoptera, 



the pygidium ; from crinitus in the much shorter dorsal 

 surface of the median segment and in colour. 



Hemithynnus hamlyn-harrisi, sp. n. 



(S . Flavo-aurantiacus ; vertico, mesonoto, mesosterno, scutello basi 

 segmentisque abdominalibus 3-7 nigris ; segmento mediano 

 flavo ; alls flavo-hyalinis, apice hyalinis. 



§ . Ferruginea ; fronte segmentisque abdominalibus 3-5 nigris ; 

 segmentis dorsalibus 1-5 macula laterali utrinque, primo fascia 

 transversa lata, 2-5 fascia iuterrupta, segmentisque ventralibus 

 2-4 macula utrinque flavis ; clypeo cariuato, in spinam acutam 

 producto. 



Long., c^ 22, 9 16 mm. 



^ . Clypeus convex, broadly truncate at the apex ; eyes 

 divergent towards the clypeus. Antennae about as long as 

 the head^ thorax, and median segment combined, the apical 

 joints slender. Interautennal prominence strongly bilobed. 

 Head and thorax opaque, closely and finely punctured ; 

 abdomen shining and sparsely punctured. Median segment 

 steeply sloped from the postscutellum ; pubescence grey on 

 the head and median segment, fulvous on the thorax. 

 Seventh dorsal segment striate, the strite curved at the apex ; 

 hypopygium triangular, with an acute apical spine, the basal 

 angles not prominent. 



? . Clypeus with a strong median carina, produced at the 

 apex into an acute spine; mandibles very stout, blunt at the 

 apex. Eyes narrowly oval. Head convex, fully half as broad 

 again as long, rounded at the posterior, angles ; head, thorax, 

 and median segment shining, very sparsely punctured, with a 

 few long scattered grey hairs. Pronotum twice as broad as 

 long; scutellum not much narrowed, a little shorter than the 

 median segment. First dorsal segment with a transverse 

 groove just before the apex ; second segment with about 

 seven irregular transverse carinse which ai'e low and curve 

 towards the base on each side, the apical margin strongly 

 raised. Segments 3-5 shining, almost smooth ; pygidium 

 vertically truncate posteriorly, the dorsal plate as long as 

 the ventral, broadly ovate, closely longitudinally striated, 

 with a long spine on each side near the apex, the apical 

 margin smooth. Fifth ventral segment rugose-striate. 



Hab. Brisbane {Hacker) ; September. Received from 

 Dr. Hamlyn-Harris. 



The male is the type. 



Both sexes are very near the common fi7. apterus, Oliv., 

 but the colour of the male is very distinct, the median 



