280 CUKCULIONID^. 



[LeCoiite. 



deeply striate, interspaces flat, rugose. Funicle 6-jointecl; tliighs and 

 claws not toothed. Length 1.7 mm.; .07 inch. 



Canada and Michigan. A little larger and darker colored than C. Zim- 

 mermanni, from which it differs chiefly by the upper surfoce being covered 

 with scale-like hairs, or small, elongate, hair-like scales; while in the pre- 

 ceding most of the scales are oval. 



Group IV. Ptaytobii. 



The species of this group differ from the CeutorhyncM only by the beak 

 being stout, and usually short, in one instance scarcely as long as the pro- 

 thorax. The prothoracic lobes are feeble or wanting, the ej^es are some- 

 times partially covered in repose, sometimes entirely free. The pectoral 

 groove is sometimes well defined by antecoxal ridges on the prosternum, 

 but occasionally these are absent. The first genus exhibits a very singular 

 reversion towards the Bagous group, with which it might indeed be placed, 

 were it not that the pygidium is exposed, and similar in sculpture to that 

 of the other members of the present tribe, and, also, that other characters 

 correspond with the position here assigned to it. 



The genera are somewhat difficult to define, in consequence of the ini 

 portant structural characters by which the species are distinguished. It 

 is probable that they will be increased in future, by those whose views 

 tend to the multiplication of genera, l)Ut for the present, I think that the 

 divisions here adopted express both conveniently and naturally the affini- 

 ties of the species known to me. 



Tarsi with the third joint dilated, bilobed 2. 



" slender, long, not dilated PHYTOBIUS. 



2. Prosternum with acute antecoxal ridges 3. 



without " •' PELENOMUS. 



3. Eyes with acutely elevated orbits CCELOGASTER. 



" without " " RHINONCUS. 



PHYTOBIUS Sch. 

 Eiijbrychius Thomson. 



In this genus the beak is stout, cylindrical, nearly as long as the protho- 

 rax ; the eyes are small, rounded, convex and fully exposed. Prothorax 

 not much wider than the head, wider than long, slightly narrower at the 

 tip, truncate before and behind, with a small angle at the scutellum ; the 

 disc is feebly longitudinally impressed behind the middle, and the lateral 

 tubercles are small and indistinct. Elytra deeply striate, nearly twice as 

 wide as the prothorax, and about three times as long, voluminous, broad 

 at the base, gradually narrowed behind. Pygidium triangular, exposed. 

 Legs long, slender, tibia? nearly straight, not mucronate ; tarsi not dilated, 

 last joint as long as the others united, with rather large simple claws. 



A remarkable and easily recognized genus, of which but one species is 

 known. Schonherr divided Phytohius into two groups of which the first 

 {genuini), was characterized by long slender tarsi. There is, therefore, 

 no excuse for retaining the name for the second group, (spurii) and it must 

 be restored to this genus afterwards named EubrycJnus by Thomson. 



