COSSONIDAE. 583 



Group COSSONIDAE. 



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



4139. Eucossonus constrictus sp. no v. 



Subdepressed, elongate, opaque ; dark fusco-rufous, antennae and tarsi 

 light chestnut-red ; sparingly clothed with decumbent, yellowish setae. 



Rostrum dull, minutely and densely sculptured, with fine frontal punc- 

 tures ; a third shorter than thorax, stout, distinctly narrowed behind the 

 antenna! insertion, near the middle. Head with a few fine punctures and 

 setae. Eyes slightly convex. Thorax nearly a third longer than broad, its 

 larger basal portion oviform, the constriction in front large and deep, base 

 truncate ; disc plane or only feebly impressed along the middle, minutely 

 and densely sculjjtured, its punctation coarse but shallow, the dilated 

 apical portion not perceptibly punctured. Scutellum small, subrotundate. 

 Elytra nearly twice the length of thorax, truncate and a little wider than 

 it is at the base, parallel, moderately curvedly narrowed behind ; distinctly 

 and closely striate-punctate ; interstices minutely rugose, the third slightly 

 elevated throughout, fifth less distinctly, not at all behind. 



Scape evidently flexuous ; second joint of the funicle rather longer than 

 the basal, joints 3-5 a little longer than broad, club moderately subelongate- 

 oval. 



Underside almost plane, subopacjue, nigro-piceous, coarsely but not 

 deeply punctured, with densely and minutely sculptured intervals, with a 

 few fine greyish setae ; the thoracic constriction quite as deep as it is above. 



This is much larger than Sharp's Sericotrogus setiger (934). E. antennalis 

 (3140), the nearest ally, has thicker antennae, the rostrum is only slightly 

 narrowed behind, and the thorax is longer and less evidently punctate. 

 The rather large and deep frontal constriction of the thorax is the chief 

 distinguishing feature of this species. 



Length (rostrum inclusive), 3J mm. ; breadth, § mm. 



Belgrove, near Nelson. The type was found by Mr. T. Hall on the 

 24th October, 1914, along with the larger (4 X f mm.) mutilated specimen, 

 from which the description of the underside has been taken. 



4140. Eucossonus sulcicollis sp. no v. 



Elongate, subdepressed, slightly nitid ; rostrum and thorax rufous, legs 

 more infuscate ; elytra, antennae, and tarsi light chestnut-red ; sparsely 

 covered with flavescent setae, decumbent and disposed transversely on the 

 thorax, longitudinally and suberect on the elytra. 



Rostrum nude, shining, and finely punctate in front, rather dull with 

 minute sculpture, and subseriate-punctate behind ; it is a third shorter 

 than thorax, hardly at all arched above, moderately narrow, a little dilated 

 behind the middle, where the antennae are inserted. Head gradually nar- 

 rowed anteriorly, with a few setae, the occiput impunctate. Thorax a 

 third longer than broad, moderately constricted near the apex, the remain- 

 ing portion oviform, base subtruncate ; distinctly but not deeply or closely 

 punctured, the intervals minutely sculptured, the apex almost impunctate ; 

 along the disc from the constriction to the base there is a well-marked 

 impression which is widest at the middle. Scutellum distinct but small. 

 Elytra parallel, rather broader than thorax at the base, which is slightly 

 arcuate, quite double its length, moderately narrowed behind ; distinctly 

 but not coarsely striate-punctate, interstices rather narrow and finely rugose, 

 the third slightly elevate throughout. 



