Broun. — Revision of the New Zealand Cossonidse. 187 



the portion behind the constriction quite oviform, rather fiat and medially 

 broadly canaliculate, its base bisinuate. Scutellum small. Elytra longer 

 and rather broader than thorax, base biarcuate. Legs rather long and 

 slender, penultimate joint of the tarsi with strongly developed lobes. 



Underside nigrescent, subopaque, with some minute setne ; the punctu- 

 ation moderately coarse, but not deep ; the intervals densely and minutely 

 sculptured. Rostrum medially earinate. Prosternum elongate, deeply im- 

 pressed near the front. Mesosternum much abbreviated, so that the in- 

 termediate coxfB are nearly in contact with the prosternum. Metasternum 

 elongate, medially sulcate behind. Basal ventral segment with an almost 

 transverse impression behind, the shorter 2nd with a more shallow im- 

 pression. 



Structurally different from Sericotrogus in almost all respects. The 

 form of the head and rostrum, and the frontal dilatation of the thorax, owing 

 to the unusually deep constriction, is remarkable. The scrobes are expanded 

 towards, and terminate in front of, the eyes ; in Sericotrogus they are di- 

 rected obliquely downwards to below the eyes. The anterior coxse are 

 more w^idely separated, but less so than in Pentarthrurn. In specimens 

 mounted on cardboard the head is sometimes retracted, and appears pecu- 

 liarly pinched in behind the eyes ; when more carefully set out the refuscent 

 globose occiput is fully exposed. 



Eucossonus comptus, Broun. 1550. Man. N.Z. Coleopt., p. 870. 



(Plate XV, fig. 16.) 



Subopaque, fusco-rufous, sometimes darker, antennae and tarsi fer- 

 ruginous ; the yellow hairs are rather elongate and decumbent on the 

 thorax, finer on the head, rostrum, and elytra ; on these they usually form 

 lines or series, on the 2nd and 4th interstices particularly. 



Rostrum finely subcarinate along the middle of the frontal half, its 

 punctuation moderately coarse, close, and rugose. Thorax broadly de- 

 pressed along the middle, with coarse shallow punctures. Elytra with 

 somewhat ill-defined sculpture, apparently with shallow punctures in the 

 stria? ; interstices slightly asperate or rugose, the 2nd from the suture some- 

 what elevated ; the setse suberect. Legs finely setose ; 3rd and 4th joints 

 of the funiculus longer than broad. 



Female. — Rostrum gradually and slightly narrowed backwards, slightly 

 nitid, moderately coarsely and closely punctured behind, much more spar- 

 ingly and finely in front. 



S' . Length, If lines ; breadth, | line. 



Waitakerei Range. Both sexes. 



E. elegans, Broun. 2419. Man. N.Z. Coleopt., p. 1386. 



Female. — Differs from 1550 in having the rostrum slightly dilated at the 

 point of antennal insertion, behind the middle. Elytra striate-punctate. 



Length, H lines ; breadth, f line. 



Moeraki. One. 



E. gracilis, Broun. 2420. Man. N.Z. Coleopt., p. 1387. 



Rather narrow. 



Rostrum more slender than that of 1550, more sparingly and finely 

 punctate. Thorax not depressed along the middle,. simply flattened there. 

 Elytra rather wider near the hind thighs. Legs more slender and scape 

 rather shorter than in E. elegans. 



3 . Length, If lines ; breadth, quite ^ line. 



Moeraki. One. - 



