CIIRYSOMELIDAE. 349 



has been suppressed, since if any division of the genus is admitted, 

 the genera Adimouia and Galeruca previously detined must be 

 adopted. 



Androlyperiis is founded upon A. fulvu.H Cr., and contains 

 also a beautiful scarlet species, A. maculalut^ Lee, 8 mm. long, 

 from San Diego, California, with two large spots on each elytron 

 black. The head, meso-, and metasteruum, scutelluin, and an- 

 tennte, and legs are also black. 



SulvTribe 2. — Halticini. 



This sub-tribe may be sufficiently defined by the large develop- 

 ment of the hind thighs, which fit them for leaping. The smaller 

 species are extremely active in this respect, which has caused 

 them in some places to be called plant-fleas. Additional char- 

 acters, which are of rare occurrence in the preceding sub-tribe, 

 are: the tibiae are frequently sulcate on the outer side, and the 

 tarsi retractile. Good characters for the separation of groups 

 may also be found in the form of the hind tibia?; the last joint of 

 tlie hind tarsi is frequently inflated, a singular character, the bio- 

 logical importance of which has so far eluded human thought. 



The front coxae are usually distinctly separated by the pro- 

 sternum, and the coxal cavities are sometimes closed behind, and 

 sometimes open; so that this character, usually so important in 

 Coleoptera, here seems to lose its significance. Nevertheless, in 

 consequence of the vast multitude of genera and species, it is one 

 which cannot be neglected in taxonomy, even if it lead to some- 

 what imperfect results. Chapuis divides them into nineteen 

 groups, of which the following seem to be rej)resented in our 

 fauna; all of which have the antennae inserted between the eyes: — 



Last joint of hind tarsi globosely inflated at tip. 2. 



Last joint of liind tarsi simple. ?>. 



2. Front coxal cavities entire, closed behind. II. Monoplati. 

 Front coxal cavities open behind. III. (Edioxyciiks. 



3. Antennre api)roximate; claws simple or appendiculate. 4. 

 Antenn;e distant ; front coxal cavities closed ; claws bifid. 



I. BLF.rnARID.'E. 



4. Antennae 11-jointed ; hind tarsi inserted at the end of the tibije. 5. 

 Antennae 10-jointed ; hind tarsi inserted on the outer side of tibirp. 



XIII. PSYLLIOHES. 



5. Ilind tibirp not toothed. (>. 

 Hind tibiaj toothed on the outer margin; 1st and 2d ventrals connate. 



XI. C'H.IJTOCMCMili. 



