TRIBE XX. CEUTORHYNCHINI. 425 



grooves on the sides and, except in Phytobii, directed against the 

 eyes; fnnicle 0- or 7 -jointed, club oval, pointed, pubescent and 

 annulated ; eyes rather large, finely granulated, well separated 

 and, except in Phytobii, more or less concealed in repose; thorax 

 usually wider than long, narrowed in front, its disc usually with 

 characteristic lateral elevations, capped by acute angulations or 

 short spines; scutellum wanting or very small; elytra broadly 

 oval, almost always distinctly wider at base than thorax; py- 

 gidium exposed, nearly perpendicular and (except in Monony- 

 cJins) with a transverse elevated line against which the tips of 

 the elytra rest ; prosternum grooved for the re'ceptiou of the beak 

 in repose, the groove sometimes extending backward even to 

 metasteruum ; first ventral segment longer than second, their 

 suture straight; second ventral prolonged at sides and, in some 

 genera, cutting off the third ; fifth ventral longer than either of 

 the two preceding; coxre all well separated; tarsi slender, the 

 third joint bilobed (except in Perentliis and Phytobitis] ; claws 

 variable. The males are distinguished by having the beak stouter 

 and less elongate, antennae less slender and usually inserted 

 nearer the apex, pygidium larger and fifth ventral subtruncate 

 and often foveate. 



The scutellum being very minute or invisible, the scutellar 

 space or area is more or less concave and this, taken in connec- 

 tion with the short, broadly oval form and the short, subconical 

 and usually tuberculate thorax, give the members of the tribe an 

 aspect easily recognizable. They are more numerous in northern 

 regions and occur mostly on herbs in low wet places, the larva? 

 either inhabiting the seeds, seed-stalks or the stems of the plants. 

 Some of the species have been introduced from Europe ; and most 

 of the genera are represented in both continents, the tribe being 

 one of holoarctic distribution. The principal paper treating o f 

 the species of this country is by 



Dictz. Win. (1. "Revision of the Genera and Species of Ceuto- 

 rhynchini inhabiting North America," in Trans. Amer. 

 Ent. Soc., XXIII, 1896, 387480. 



In it are recognized 102 species, distributed among 18 genera. 

 Of these Gf> species belonging to IT genera, have been recorded as 

 occurring in our territory. For convenience of treatment the 

 genera are grouped into four subtribes, rather feebly distin- 

 guished as follows : 



