nin PAMHA' Llir. — {!riKVSOMElJn/K. 



XT I. ExEMA Liic. 1849. 



Two very small s{)(H'i(>s rcprosont this ji'enus in the eastern 

 United States, both of whicli oeeur in Iiidiana. 



KEY TO THE SPECIES OF EXEMA. 



(/. Dark cniircons. Itrdiized: thorax strigose. 20~tC>. dispak. 



Art. Black without metallic lustre; thorax pvmctnte. 2057. gibber. 



205G (GGOoa). Exema dispar Lac, Mon., II, ISJS, sr.O. 



Oblong, snbquadrate. Blackish, feebly bronzed ; antennte and labruni 

 usually dull yellow. Thorax finely strigose, the crest of the median tuber- 

 cle sulcate but not bifid. Elytra with tubercles as in G. plicata; intervals 

 with coarse, deep, rather close-set punctures. Prosternum concave. Length 

 2.5-3 mm. 



Throughont the State ; frequent. June 0-September 25. Taken 

 by sweeping' herbage ah^ng roadsides. 



2057 (6G04). Exema gibber Fabr., Suppl. Ent. Syst., 1798, 112. 



Oblong-quadrate. Black, without lustre, often more or less siwtted 

 with yellow; labruin and legs yellow. Thorax densely punctate, the crest 

 with a shallow median groove. Elytra with oblique oblong tubercles ; in- 

 tervals coarsely and rather closely punctate. Prosternum flat. Length 

 2-2.5 mm. 



Starke, i\Larshall, Putnam and Posey counties; rare. May 11- 

 June 18. Taken by sweeping. 



Tribe VI. CRYPTOCEPHALINI. 



To this tribe belong numerous small, robust, more or less cylin- 

 drical si)ecies having the antenna' slender, filiform, longer than head 

 and thorax, rarely {MonacJius) shorter and subserratc; thorax mar- 

 gined, as wide as elytra and closely applied to the latter; eyes large, 

 more or less emarginate; elytra not tuberculate, marked with rows 

 of punctures, rather short, leaving the tip of abdomen exposed; 

 prosternum wide, separating the front coxiP, which are rounded, not 

 ])rominent, their cavities enclosed behind; iniddle and hind coxa^ 

 eacli widely separated ; tarsi dilated, claws usually simple, rarely 

 l)roadly dilated at base. The tribe is founded upon the geniLs 

 Ch-yptoceplialiis-, of Geoffroy, a term meaning "concealed head," 

 and given to these insects because the head is so deeply immersed in 

 the strongly convex thorax that it can be scarcely or not at all seen 

 when viewed from above. In color they are usually variegated with 

 various com])inations of spots or stripes Avhich are sometimes very 

 inconstant, so that numerous varieties liave been named. 



Seven genera com})Ose the ti'ibe, all of which are represented in 

 the State. In addition to the papers cited under the family head- 

 ing, the following treat especially of these genera: 



