TIIK SAI'-KKKDlNli KKKTI;ES. ()29 



Iral sc^iric'iils ; legs short, somewhat stout, retractile or partly so: 

 tarsi short, usually dilated and hairy beneath, usua'ly five-jointed, 

 with the fourth joint very snia'l. rarely tour- or three-jointed. 



Practically the only available paper treating of the North Amer- 

 ican species of the family is that of 



Horn. "Revision of the Nitidulida- of the Tnited States," in 

 Trans. Amer. Ent. Sex-.. VII. 1ST!), 2<>7-:W(>. 



About 120 species of the family, divided among )52 genera, ai ' ( ' 

 known from North America. Of these 4!> species, belonging to 22 

 genera, have been taken in Indiana. For convenience the family 

 was first divided by Horn into eight tribes, seven of which are rep- 

 resented in the collection ;it hand. 



KEY TO I .\niA\A TKII5KS (II MIIDl 1.IH.K. 



</. Antenna- 11-jointed. ending in a three-jointed club;* all the tarsi similar 



in both sexes. 

 l>. Tarsi 5-jointed. 



r. Labruin free. more (ir less visible; color rarely shining black. 

 (/. Maxilla- with two lobes; antenna! club elongate, loose. 



Tribe I. HKACHYPTERINI, p. <>U!>. 



ild. Maxilla- with one lobe; antennal club rounded, compact. 

 e. Thorax not margined at base; head horizontal. 

 f. Abdomen with two or three segments exposed. 



Tribe II. CAKPOPHILINI, p. 631. 



/'/' Abdomen wholly covered or with but one segment exposed. 



Tribe III. NITIDULINI. p. 035. 



<<'. Thorax margined at base, covering the base of elytra; head 

 more or less bent downward. 



Tribe IV. CYCHKAMINI. p. 645. 



cc. Labrum united with tbe front or lower part of face; color usually 

 shining black or piceous with reddish or yellow markings. 



Tribe "VI. IPINI, p. G4S. 



bit. Tarsi four-jointed; body contractile; thorax margined at base, cover- 

 ing the base of elytra. Tribe V. CYBOCEPHALINI, p. 647. 

 mi. Antenna^ 10-jointed, the club two-jointed; hind tarsi of males 4-jointed. 



Tribe VII. RHYZOPHAGINI, p. 650. 



Tribe I. BIIA* 'IIYI'TKUI XI. 



The members of this tribe otcur visually on Mowers and have 

 the antennal club gradually formed and not of compact construc- 

 tion; maxilla- with two lobes; labruni distinct, usually small, often 

 deeply emarginate. The males have a small additional apical dors:d 

 segment. Four genera constitute the tribe, two of which are rep- 

 resented in Indiana. 



*In some species of Cercus the club has hut two joints. 



