51 



tarsi, and half of the femora blackish, and the scutellum 

 infuscated. 



Metriorrhynchus fumosus, Macl. 



Seven specimens, from Cairns, agree with the types of 

 this species, they are opaque-black, to the naked eye (owing 

 to pubescence) appearing a smoky-brown, the antennae are 

 strongly serrated in both sexes, and the scutellum is some- 

 what narrowed posteriorly, with its end truncated ; the length 

 varies from 5 to 9 mm. The female differs from M. opacus, 

 of which only a female is known, in the more strongly serrated 

 antennae, prothorax almost parallel-sided and snorter, and 

 in the scutellum, that of opacus being emarginate at the apex, 

 with the ends conspicuously produced. 



Metriorrhynchus centralis, Macl. 

 The types of this species are females; in general appear- 

 ance they are extremely close to the types of M. elongatus, 

 but differ in the central areolet of the prothorax; on M. 

 centralis it is terminated fully one-third from the apex of 

 the prothorax, on elongatus it extends much nearer to the 

 apex. Two males, from Cairns, that probably belong to 

 centralis, differ from the types in being somewhat smaller and 

 narrower, antennae and legs longer, the former more strongly 

 serrated, the prothorax less transverse, and in the abdomen. 



Metriorrhynchus gracilis, Lea. 

 On this species the front margin of the prothorax is 

 thickened, with a row of punctures almost dividing it into 

 two parallel parts. A second specimen agrees with the type 

 in having the four front areolets of the prothorax ill-denned ; 

 but on two males they are sharply denned, their connecting 

 costae being distinct to the hind part of the apical thicken- 

 ing; one of these males has the black tips to the elytra rather 

 larger than on the others, although they are still rather small 

 and oblique. 



Metriorrhynchus atricornis, Lea. 



A specimen, from Cairns, probably belongs to this species, 

 but has the scutellum black, and extreme base of elytra flavous ; 

 the sides of its prothorax near the base are suddenly incurved, 

 but the angles themselves are much as on the typical form ; 

 the difference is probably due to contraction in drying. In 

 my table/ 2 ) owing to the elytra not being entirely dark, it 

 would be associated with M. ampliatus, but that species has 

 the pale basal portion larger (distinct to the naked eye), and 

 prothorax with five, instead of three, areolets. 



(2) Lea, Trans. Ent. Soc. Lond., 1909, p. 51. 



