280 MR. R. E. TURNER ON THE [Feb. 1 5, 



the median segment of the male is absent in all specimens I have 

 seen of abductor. The median segment is rather shorter and 

 more rectangular than in either of the two species mentioned. 



GYMNOTHYNNUS (?) LESCEUFI, Sp. n. 



<$ . Clypeus strongly convex, produced and narrowly truncate 

 at the apex. Head very closely and rather coarsely punctured ; 

 the antennae about as long as the thorax without the median 

 segment. Thorax finely and closely punctured ; the pronotum 

 narrower than the head, narrowed anteriorly; the scutellum 

 rather broadly truncate at the apex. Median segment rounded, 

 smooth and shining at the base, very finely punctured at the 

 apex. Abdomen about as long as the head, thorax, and median 

 segment combined, elongate fusiform, punctured, the segments 

 strongly constricted at the base, the apical margin narrowly 

 depressed. Sixth ventral segment without spines. Hypopygium 

 broad, tridentate at the apex, the lateral spines short. Second 

 cubital cell about equal in length to the third on the radial 

 nervure, the first recurrent nervure received at about three- 

 qiiarters from the base of the second cubital cell, the second 

 received at one-fifth from the base of the third cubital cell. 



Black ; the mandibles at the base, the anterior margin of the 

 clypeus, the margins of the pronotum, tegulse, a narrow and 

 obscure longitudinal line on the mesonotum, a broader one on the 

 scutellum, and a transverse band on the postscutellum pale luteous 

 yellow ; anterior tibiae and tarsi ferruginous. Wings hyaline, 

 nervures black, the stigma pale ferruginous. 



Length 8 mm. 



$ . Head strongly compressed laterally, as thick as broad, the 

 sides slightly concave at the posterior angles, broadened at the 

 base of the mandibles, nearly twice as long as the greatest breadth, 

 deflexed anteriorly, the front, rather strongly punctured, with an 

 obscure longitudinal sulcus, the vertex smooth. Pronotum 

 broader than the head, almost rectangular, nearly half as long 

 again as broad, quite flat and opaque ; scutellum shining, small 

 and narrow. Median segment shining and punctured, very narrow 

 at the base, broadened and abruptly truncate posteriorly, a little 

 longer than the scutellum. Abdomen much broader than the 

 thorax, the segments very broadly depressed a/t the apex, punctured 

 at the base, with a smooth rounded mark on each side before the 

 depressed area. Pygidium long and narrow, deflexed, with long 

 pubescence at the sides. 



Black ; the depressed apical portion of the abdominal segments 

 shining and very pale lutaceous ; pygidium fusco-ferruginous. 



Length 4 mm. 



Hab. South Perth, W. A. (H. M. Giles), o" $ in cop. January. 



" On Leptospermum bloom." 



The female is very distinct ; the shape of the head is remarkable 

 and also the absence of carina? on the second abdominal segment. 

 In the flattened pronotum it approaches gllberti Turn. 



