160 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 92 
claws cleft. The genus differs from Cnemarachis mainly in the shape 
of the claws, which in Cnemarachis are never cleft. 
Genotype—Phytalus smithi Arrow, from Trinidad and Barbados. 
The genus is not well separated from the main group of Cnema- 
rachis, and were it not for certain larval differences I would rather 
treat it as a subgenus of Cnemarachis. 
Phytalus apicalis Blanchard, which occurs commonly in Puerto 
Rico, also belongs in the genus Clemora. 
KEY TO THE PHYLLOPHAGAN GENERA OF THE NEW WORLD 
1. Tarsal claws each with 2 distinct teeth (pl. 17, fig. 9e) in addition to a basal 
dilation and apical tooth; hind and middle tibiae of both sexes without a 
complete carina across each tibia, the carina indicated by a blunt toothlike 
lobe; propygidium with a moderately broad, well-marked, flat, longitudinal 
groove extending entire length of segment; no external sexual differences 
obvious, male abdomen simple as in female. Mexico and United States 
Triodonyx, new genus 
Tarsal claws with but one tooth in addition to basal angulation and apical 
tooth ; hind and middle tibiae with or without a complete carina ; propygidium 
always plane; sexual differences always evident and usually well marked 
externally in antennal length and form and in abdominal characters; 
abdomen always with obvious differences between sexes_________________ 2 
2. Hither one, but more commonly both, of hind and middle tibiae of each sex 
with an incomplete carina (pl. 17, figs. 1-5) ; lateral margins of tibiae usually 
with separate edges or well-marked spines, rarely (crinitissima, pl. 17, fig. 5) 
without either carina or teeth or spines. West Indies__-.--____________ 3 
Hind and middle tibiae each of both sexes usually with a complete transverse 
or oblique carina at about middle (pl. 17, figs. 1-7, 10-13); if absent on 
hind tibia of male, then there is a complete carina on at least the middle 
tibia; females always with a complete carina on both middle and hind 
tibiae ; * lateral margins of tibiae usually without teeth or spines.’ American 
continentalaspecies™ - = .ts2 eee es Se Phyllophaga Harris 
3. Claws never cleft, but with a median or submedian tooth. West Indies 
Cnemarachis, new genus 
Claws distinctly cleft at apex. West Indies_______ eae es Clemora, new genus 
KEY TO SUBGENERA OF CNEMARACHIS 
1. Claws with a distinct median tooth; tibiae never with complete or nearly 
complete carina (pl. 17, figs. 1-4) -_--___________ Cnemarachis, new subgenus 
Claws entirely simple, without trace of a median tooth; hind tibia with a 
weak though nearly complete carina; middle tibia with carina usually com- 
plete, at times weakly indicated at middle (pl. 17, fig. 5). 
Abcrana, new subgenus 
*In rare cases, e. g., P. inversa (pl. 17, fig. 10), ecostata, and some specimens of barda, 
the carina may be weak or incomplete on both middle and hind tibiae of male, but in such 
instances the absence of lateral tibial spines or teeth in the males, or the presence of a 
complete carina of the female, if such is available, will allow ready reference to the proper 
genus. 
5 Or, if these are present, as is rarely the case, as in the Mexican species P. bolacoides 
and scissa (pl. 17, fig. 7), the tibiae are strongly carinate. 
