166 
THE ORDER OF COREOFTERA. 
is scarcely bilobed, and the claws are usually simple. In the latter, the 
thorax is very convex, narrower than the abdomen, and with the mar- 
gin indistinct or wanting; the antennae are slender, almost filiform, and 
about half as long as the body ; anterior coxae globose; the third joint 
of the tarsi is deeply bilobed, and the claws are bifid. 
The larvae live exposed on the leaves of herbaceous plants, upon which 
they feed. We do not know of any larva in this sub-family which covers 
itself with excrement, unless we admit into it the intermediate genus 
Blepharida, which we have preferred to unite with the other saltatory 
species. 
The following are the genera of Chrysomelini : 
A. Third joint of tarsi entire or slightly notched at the end ; posterior episterna usually narrowed 
behind. 
13. Form regularly oval and strongly convex; tarsi entire ; color usually yellow, with darker stripes 
or spots ; length between a quarter and a half of an inch Chrysomela. 
B B. Form oval or oblong oval, convex ; third joint of tarsi notched ; color metallic-green or blue; 
length less than quarter of an inch Gastrophysa. 
B BB. Form short and round or sub globuse; dark metallic without spots; length much less than 
quarter of an inch Phasdon. 
B B B 13. Form oblong, narrow, parallel, depressed; antonna? strongly clavate ; dark metallic, with 
a few yellow stripes; length much less than quarter of an inch Pkasocuris. 
A A . Third joint of tarsi deeply bilobed ; posterior episterna parallel ; form oblong oval and depressed ; 
colors various; size same as Chrysomela Plagiodera. 
The following are the genera of Eumolpini : 
A. Body smooth and shining. 
B. Thorax lobed behind the eyes. 
C. Elytra irregularly punctured ; claws with a tooth beneath. 
D. Antennae robust, somewhat clavate ; color golden-green or blue ; length a third of an inch or 
more Chuysochub. 
D D. Antennae long and filiform ; color golden-green or bronze ; length a quarter of an inch or 
] e88 Typophorus. 
C C. Elytra punctured in rows ; claws bifid; size small ; color brown with black spots, rarely 
wholly black Paw a. 
B B. Thorax not lobed behind the eyes. 
E. Second joint of the antenna? shorter than the third ; elytra densely but irregularly punc- 
tate OOLA8PI8. 
E E. Second aud third joints of antenna? equal ; elytra punctured in rows Metachuoma. 
A A. Body more or less clothed with hair or scales. 
F. Thorax without a margin at the sides. 
G. Body shining, bronze, rarely green ; punctures indistinct; sparsely haired. .Heteraspis. 
G G. Body obscure, brown, coarsely punctured. 
H. Thorax longer than wide; body donsely haired ; size about medium Fidia. 
H II. Thorax wider than long ; body moderately haired ; size small Xantuonia. 
The genus Chrysomela lias been divided into a number of sub- genera 
which can generally be distinguished by their style of coloration, as 
follows : Labidomera , Chevr , dark -yellow, with a few large blue-black 
spots ; Myocoryna, Stal., usually with the elytra pale-yellow, with four 
or five darker stripes on each ; Zygogramma , Chevr., elytra with two or 
three stripes more or less united ; Galligrapha, Chevr., elytra with 
numerous irregular lines and dots ; and Chrysomela , Linn., -blackish or 
golden, without stripes; but there are some exceptions to these general 
