CIIRYSOMELIDAE. 35o 



TIloy arc separated from all the preceding tribes by the aiitenii;o 

 having" but lO-joints, and by the hind tarsi being inserted on llu; 

 side of the tibiai, ver}"- slender, not much elongated, but with the 

 1st joint longer than the others united; the claws are small and 

 simple; the hind thighs are very thick, and the spur of the hind 

 tibia; acute but very small. 



Tribe X.— HISPIIVI. 



This and the next tribe are remarkable by having the anterior 

 part of the head prominent, so tliat (as in certain Lamiime of the 

 preceding family) the mouth is confined to the under surface of 

 the head. The two tribes constituting this series of the Chryso- 

 melidiie differ chiefly in the form of body. In the present instance 

 it is narrowed in front, wedge-shaped, broad and truncate behind, 

 without foliaceous margins; the head is not covered by the pro- 

 thorax, which is emarginate or truncate in front. In Cassidini 

 the margins of both prothorax and elytra are broadly foliaceous; 

 the former is rounded in front, and entirely conceals the head. 

 The species of these two tribes have the interesting habit, w^hile 

 in the larvae condition, of covering themselves with a shelter tent 

 composed of their own excrement. 



Our genera are few in number, and are represented by but a 

 small number of species; although Dr. Chapuis (Lacordaire, Gen. 

 Col., xi. 263) has indicated twenty groups in this tribe, we think 

 that the small number of types represented in our fauna will war- 

 rant us in arranging them in one series, as follows : — 

 Tarsi with 3(1 joint broad, more or less bilobed ; 

 Antennae distinctly 11-jointed ; 



Elytra not costate, stride finely punctured, body elongate. Stenispa. 



Elytra costate, strife coarsely punctured. Odontota 



Antennae apparently but 9-jointed, joints 9-11 connate, lorniing an 



elongate club. Microrhopala. 



Tarsi with 3d joint narrow, not bilobed, fourth as long as the others 



united. Stenopodius. 



The last genus has been established by Dr. Ilorn on a very 

 singular species, S. Jiavuhn^, San Diego, California. It is of a 

 pale yellow color, with a few small black spots ou the elytra. 



Tribe XL— CASSIDINI. 



This tribe is suflSciently separated from the preceding by the 

 expanded margins of the prothorax and elytra; the head in n)o.st 



