BY ROWLAND E. TURNER. 207 



of median segment oehraceous-brown. Thorax beneath light 

 ochraceous-brown, mesopleurse black with an ochraceous line below 

 base of primaries. Coxae, femora and trochanters beneath, 

 anterior tibiae and tarsi ochraceous, posterior tibiae fuscous. The 

 truncation of first abdominal segment, a narrowly interrupted 

 median transverse band on segments 2-6 pale yellow, median 

 interruption broader on apical segments; the five basal segments 

 beneath with an obscure black apical spot and a band on apical 

 margin of sixth pale yellow. Wings hyaline, nervures testaceous- 

 brown, tegulae luteous-yellow. Length 16 mm. 



Hab.—Port Darwin (G. Turner). 



Most nearly allied to T. nigropectus Sm., but is much less 

 strongly punctured. The colour is also different and less 

 extensive. 



154. T. zonatus Guer. 



Thynnus zonatus Guer., Voy. Coq. ii. 2, p.222, 1830 [1839] (<J). 



Thynnus nigropectus Sm., Descr. n.sp. Hym. B.M. p. 16 5, n.19, 

 1879 ($). 



This is near T. darwiniensis, but is much larger; the whole 

 insect is closely punctured, the coloured areas are more extensive, 

 especially on the abdomen, and of a much brighter yellow. The 

 abdomen is of a much more elongate shape. The hypopygium 

 has two spines on each side; Smith says it is trifid. The colour 

 of the mesothorax and abdomen differs slightly from Guerin's 

 description, but I think my determination is correct. Guerin 

 gives the length as 27 mm. I have a specimen measuring 

 23 mm., but Smith's type is smaller. 



Hab. — Swan River (Smith), Roebourne, N.W.A. (French). 

 Guerin gives no locality. 



155. T. elgneri n.sp. 



$. Clypeus large, very broadly truncate at apex, finely longi- 

 tudinally striated, pointed at base and touching interantennal 

 prominence, which is very widely V-shaped. Head strongly 

 punctured, anterior ocellus situated in a small depression. 

 Thorax less strongly punctured than head; scutellum broadly 



