322 Mr. F. P. Pascoe on the 
from the United States. According to their description of 
the genus Centrinus, as applicable to those species, the ante- 
rior cox are “rather widely separated,” the femora “un- 
armed,” and the tarsi “ with stout divergent claws.” They 
add, “In the males of several species the prosternum [pectus] 
just in front of the coxe is armed with a slender process, 
which varies in length according to the individual, but not 
according to the species.” 
The table below is only intended to be suggestive of some 
of the genera that will be necessary when the group is more 
extensively examined. For the present it will be best to 
continue the old name. The majority of the species are un- 
known to me, and in the identification of those described in 
Schénherr’s great work much is lost by the neglect of the 
characters afforded by the claws, the comparative length of 
the funicular joints, and the underpart generally, while the 
invariable reference to some other species for the size is very 
trying. 
Claws free. 
Canal nearly obsolete cr absent. 
Anterior coxe separated. 
Prosternum lower than the coxe. 
Elytra broader than the pro- 
UB OTA Ye Seis chs oe atlas Centrinus. C, bicuspis, Germ. 
Elytra not broader than the pro- 
ANOEAK wre. ae seen Oe Gereus. C. senilis, Gyll. 
Prosternum on a level with the 
ROMO" bole ieee ae Salmites. C. querulus, 0. sp. 
Anterior cox approximate ...... Balbus. C. conicollis, Boh. 
Canal distinct. 
Scrobes lateral. 
Hemera toothed. . 7)... scene Lydamis. C. angulus, Boh. 
Femora mutic. 
Canal prolonged between the 
anterior COxX®@ .......... Rhianus. C. mexicanus, Boh. 
Canal not prolonged between 
the anterior coxe ...... Ortycus. C. perdiz, n. sp. 
Scrobes oblique, united beneath .. Dimesus. C. geminus, n. sp. 
Scrobes oblique, running beneath 
bubt/not united™, ceatiecin occ: Optatus. C. palmaris, n. sp. 
