OTIORIIYNCniDAE. 439 



posterior corbels and the straiglit first abdominal suture would 

 seem to place here tlie two genera included in Lacord aire's 

 Blosyrideif, with which, however, tliey have but little in common. 

 Two genera are thus separated: — 



Scape attaining the middle of the eyes, tlie latter moderately prominent, 

 without posterior orbit. Hormorus. 



Scape barely attaining the anterior margin of the eye, the latter spherical, 

 prominent, and with postcior orbit. Agasphaerops. 



These two genera have the elytra at base feebly cniarginate 

 and somewhat broader tlian the thorax, the humeri being broadly 

 rounded in the latter and subrectangular in the former genus. 

 There is also a close superficial resemblance to Otiorhynchus, 

 especially in the second, where the surface is black and witli few 

 and inconspicuous scales. Hormorus is however more ornate. 



One species of Hormorus from the Atlantic, and one Agas- 

 phaerops from California represent this group. 



Group V. — Brachyderes. 



Rostrum stout, subquadrangular, very little longer than the 

 head, slightly narrower in front. Scrobes moderately deep, sud- 

 denly arcuate, passing toward the lower margin of the eye but not 

 beneath it. Intercoxal process broad, oval at tip. Corbels of 

 posterior tibife open. First ventral suture sinuous. Tarsal claws 

 connate, nearly to their tips. 



In this group the antennas are more slender, and the scape, 

 especially, longer than is seen in any other groups of the tribe. 

 One species occurs in our fauna, introduced from Europe, Bra- 

 cJii/derus incanus, an elongate species (3G mm ) piceous, feebly 

 clothed with scale-like hairs. It has occurred at St. Louis. 



Group VI. — Trigonoscutae. 



Anterior tibiic with the outer apical angle prolonged. Articular 

 surfaces of hind tibiai strongly cavernous and scaly. 



The supports of the deciduous ])ieces are not prominent. These 

 pieces are ratiier long, very feebly arcuate, and oljtuse at tip. The 

 generic description given by Motschulsky is so extremely vague 

 and short as to be entirely valueless, and in strict justice the 

 genus should be credited to Lacordaire. 



Tr'igonosciifu pilosa, the only representative of this group, is 

 not rare on the sea-coast of California. 



