THE LEAP BEETLES. 1115 



the curious habit of enclosing themselves in compact cases, com- 

 posed of their o-ss'ii exi rement, which they mould into shape by 

 means of their mandibles. Thoy carry their cases about with them 

 by protruding the front part of their bodies through the open ex- 

 tremity. (Fig. 482, h.) When about to transform they attach 

 their cases to the twigs, and close the opening, thus making them 

 answer the purpose of a cocoon. 



Two genera compose the tribe. The latest paper treating of 

 them is by 



Linell. Martin L. — "New Species of Coleoptera of the Family 

 Chrysomelidffi with a Short Eeview of the Tribe Chlamy- 

 dini," in Proc. U. S. Nat. Mus., XX, 1897, 473-485. 



KEY TO GENERA OV CHLAMYDINI. 



a. Antennpe serrate from the fourth or fifth joint. XL Chlamys. 



na. Antennfe serrate from the sixth joint. XII. Exema. 



XI. r.HL.Mrys Knoc-lL 1801. (NL., "A cloak or mantle.") 

 Two species prol)ably occur in the State. 



KEY TO INDIANA SPECIES OF CHLAMYS. 



(I. Elytral intervals not or obsoletely punctate ; length 4 mm. 



2055. PLICATA. 



(1(1. Elytral intervals closely and deeply punctate ; length not over 3 mm. 



CKIBKIPENNIS. 



2054 (C601). Chlamys pucata Fab., Ent. Syst. 

 Supp., 1798, 111. 

 Short, robust, oblong-quadrate. Brown, 



bronzed; elytra and legs sometimes blackish. 



Thorax with surface finely and densely strigose; 



disk with n large central tubercle which is 

 sparsely and coarsely punctured in front and bifid at 

 summit. Elytra each with 12 to 15 tubercles, the four 

 largest of which ai-e arranged in an oblique row ex- 

 tending from humerus to suture; intervals between 

 the tubercles sparsely punctate, either flat or coverefl 

 with smaller tubercles. Length 4 mm. (Fig. 482.) 



Throughout the State, frequent; more so in 

 Fig. 482 a,urvi: /-.iamc the Southern counties. ^May 16-September 22. 

 will, body protruding from ,),,,. ^^ foliage of various kinds, usnallv that 



case; c, beetle, (.\fter .\i.ir- & ? 



i^tt.) ,,f roadside weeds. 



G. criliriix-iniis Lee, length 3 mm., was described from Detroit, 

 i\lichigan, and may occur in northern Indiana. 



