54 ME. R. E. TURNER OX 



punctured ; seventh dorsal segment very broadly truncate at the 

 apex ; hypopygium truncate at the apex, with a strong apical 

 spine. Second abscissa of the radius more than half as long 

 again as the third ; first recurrent nervure received beyond two- 

 thirds from the base of the second cubital cell, second at about 

 one-eighth from the base of the third cubital cell. 



5 . Head as long as the greatest breadth, strongly narrowed 

 posteriorly ; a broad, shallow depression on each side, with a 

 shallow frontal sulcus, smooth. Pronotum smooth, opaque, 

 a little longer than broad, slightly narrowed posteriorly ; 

 seutellum transverse, broader than long; dorsal surface of the 

 median segment no longer than the seutellum, shining, witji a few 

 scattered punctures. First dorsal segment broadly depressed at 

 the apex, the raised basal portion strongly bilobed ; second dorsal 

 segment with two strong transverse carinas near the base, the 

 apical margin also raised ; third and fourth segments narrowly 

 depressed at the apex. Pygidium very narrow, the dorsal plate 

 sharply narrowed into a point at the apex, the ventral plate 

 notched at the apex ; a tuft of pale golden hairs on each side. 



Hab. Kalamunda, Darling Ranges, S.W. Australia ; March 

 and April. Perth ; February. J § in cop. 



This is related to G. lesoQufi Turn., especially in the male sex, 

 but the shape of the head and thorax and the sculpture of the 

 abdomen of the female are very different. The flattened pronotum 

 of the female seems to be characteristic of this genus. 



Gymnothynnus (?) mucronatus, sp. n. (PI. I. figs. 15, 16.) 



S . Niger : mandibulis, clypeo margine apicali, pronoto margine 

 anteriore, tegulis basi, scutello macula mediana, postscutelloque 

 linea transversa pallide flavis ; alis hyalinis, venis nigris, stigmate 

 f usco-ferrugineo ; hypopygio trilobato, loba apicali elongata, 

 mucronata. 



$ . Fusco-nigra ; segmentis abdominalibus apice late luteo- 

 testaceis; pygidio pallide ferrugineo, crinito ; segmento dorsali 

 secunclo haud transverse carinato, dimidio apicali valde depresso. 



Long., S 7 mm. ; 5 5 mm. 



<S . Clypeus produced and narrowly truncate at the apex : 

 interantennal prominence obsolete ; antennae shorter than the 

 thorax and median segment combined, of almost even thickness 

 throughout ; head closely punctured, the clypeus smooth and 

 flattened. Thorax rather closely punctured ; median segment 

 smooth and shining at the base. Abdomen fusiform, the segments 

 strongly constricted at the base, smooth and shining, the two 

 apical segments closely punctured. The head, sides of the abdo- 

 men and thorax clothed with long whitish hairs. Hypopygium 

 trilobed, the lateral lobes not very strongly developed, the median 

 lobe much longer than the lateral, nearly twice as long as broad 

 and rounded at the apex, without an apical spine. Second 

 abscissa of the radius more than half as long again as the third ; 



