8G 
THE ORDER OF COLEOPTERA. 
The, following table shows the principal N. American genera of Melo- 
lonthides, east of the Rocky Mountains : 
A. Elytra narrowed and sometimes separate at their tips ; tarsal claws equal and simple; whole body, 
except elytra, covered with long dense hairs LiCHNANTHB, 4. 
A A. Elytra not dehiscent; some or all of the tarsal claws bifid ; body not conspicuously hairy. 
15. Tibi® with one spur, and hind tarsi with a single entire claw Hoplia, 11. 
15 15. Tibia? with two spurs ; all the tarsi with two bifid claws. 
C. Club of antenna* with seven loafets in the male and six In the female; body spotted or stri- 
ped with short, prostrate, whitish hairs PoLYl'HYLLA, 7. 
C 0. Club of antonme with 3 leafets ; color generally uniform. 
D. Claws chelate or capable of being folded down upon the last tarsal joint, minutely cleft at 
the end, the teeth lying side by side; body parallel and depressed.. .D ichelon yci i a, 14. 
T) 1). Claws not chelate, strongly bifid, one tooth above the other; body convex. 
E. Anterior coxa* not prominent ; ventral segments soldered together with their sutures 
indistinct ; medium or large insects, usually moro than hall an inch in length : 
PHYLJXJPHAGA, fit). 
EE. A nterior coxa? elongated and prominent; ventral segments distinct; small species; 
less than half an inch in length. 
F. Body densely clothed with ochreous scales; tarsi vory long Macuodactylub, 3. 
F F. Body usually clothed with a fine silken puhevseense; ventral segments six ; hind 
coxa? very broad SEBICA, 16. 
F F F. Body naked; glabrous; ventral segments live; hind coxa- normal : 
Dir LOT AXIS, 3‘J. 
Lichnantlie vulpina, Ilentz, is a little more than half an inch long, 
and is at ouco distinguished by its elytra being narrowed and separated 
at their ends, and by the body being densely clothed with long rust- 
yellow hairs. It is quite a rare insect. 
The L. lupina, LeConte, found on the Atlantic coast, is much smaller 
than the above, and less densely clothed with cinereous hairs. The ely- 
tra in this species do not separate at the tip. 
The Hoplia trifasciata , Say, is about a third of an inch long, reddish 
brown, and more or less covered with whitish scales, which are so ar- 
ranged on the elytra as to form three imperfect transverse bauds. 
H. modesta, Haiti., is smaller and paler, and the clothing ot the elytra 
resembles hairs more than scales. The other species are more rare, and 
several of them inhabit California. Two species of Polyphylla are 
found in the Eastern States : P. occidentalism Linn., in the Southern At- 
lantic States — often more than an picli in length, with the white down 
on the elytra arranged in regular stripes; and, P. variolosa, Ilentz, 
found in the Middle States, and as far North as Massachusetts less 
than an inch in length, and having the elytra irregularly spotted in- 
stead of striped. The club of the antennae is much longer in the males 
than in the females, a character not peculiar, however, to this genus. 
JHchclmyclia, Kirby, is composed of a considerable number ot small, 
elongated, depressed species, usually having the elytra more or less 
tinted with brassy-green, and often requiring a close examination to 
distinguish one species from another. Our two common species are the 
elongata , Fab., and the linearis of Gyllenhal. They diiier slightly in 
