Uttle-knoicn Species of Yhyx\x\\diS&. l-tS 



The flattened portion of the clypeus and the extreme apex 

 of the median segment are witliout pubescence and shining, 

 the remainder of tiie insect opaque. The anterior coxee are 

 very slightly concave beneath. Wings hyaline, nervures 

 black. 



Length 18 mm. 



Hah. Gippsland, Victoria. 



Very near T. atrox. Turn., from Western Australia, but 

 the sculpture of the clypeus is different, and the spines at 

 the basal angles of the hypopygium are not developed. The 

 tubercle at the base of the second ventral segment, which is 

 strongly developed in T. atrox, is absent in the present 

 species. 



Thynnus muUi'strigaiuSj sp. n. 



? . Head shining, very sparsely, but rather deeply 

 punctured, more closely on the front between the antennae, 

 very slightly convex, more than lialf as broad again as long, 

 and rounded at the posterior angles : the eyes oval, not 

 touching the base of the mandibles. Thorax and median 

 segment shining and very sparsely punctured ; the pronotum 

 as broad as the head, nearly twice as broad anteriorly as 

 long, very slightly narrowed posteriorly, with a row of 

 setigerous punctures on the anterior margin which is almost 

 straight. The scutellum is narrowed and broadly rounded 

 posteriorly; the median segment very short, obliquely trun- 

 cated from just behind the scutellum ; the pleurae smooth and 

 shining. Abdomen shining, segments 3-5 almost smooth ; 

 the first segment truncate anteriorly, the face of the trun- 

 cation strongly concave, the dorsal surface rugosely punctured 

 at the base, with a patch of long pubescence in the middle, 

 and with three transverse carinfe near the apex, which are 

 separated from the recurved apical margin by a rather broad 

 transverse groove. Second segment with about twenty 

 transverse carinse, those near the base low and fine, very near 

 together, those near the apex much stronger and farther 

 apart. Pygidium truncate posteriorly, strongly constricted 

 before the base of the truncation and transversely striated, 

 the surface of the truncation ovate and smooth, the hypo- 

 pygium not emarginate at the apex. Fifth ventral segment 

 coaisi;ly longitudinally striated and deeply emarginate at the 

 apex. The basal joint of the intermediate tarsi is broad and 

 flat, but not as strongly so as in some of the allied species. 

 The clypeus is transverse, convex in the middle but not 

 carinate, and closely punctured. 



Black; the scutellum, a spot on each side of the first and 



