600 FAMILY XXV. — HISTERJD.I';. 



LeConte, John E. — "A Monograph of the North Ameri<'an His- 

 teroides," in Bost. Joum. Nat. Hist., V, 1845. 32-86, pis. 

 I-VI. 

 Horn. — "Synopsis of the Histerida3 of the United States," in 



Proc. Amer. Phil. Soc, XIII, 1873, 270-363. 

 Casey. — "Descriptions of isolated Genera and Species of His- 



terida;," in Ann. N. Y. Acad. Sci., VII, 1893, 533-578. 

 Nearly 2,000 species of the family are known, about 260 of which 

 are from North America. Of these 6*^, distributed among 13 genera, 

 have been taken in Indiana. The family is first divided into three 

 tribes, and these in turn into genera. 



KEY TO TRIBES OF HISTEKIDiE. 



a. Head stretched out forward or horizontal; mandibles very prominent; 



form ver.v much depressed. Tribe I. IIololeptini, p. 600. 



aa. Head retracted, bent downward; mandibles not very prominent; form 



convex, usually rounded, oval or cylindrical. 



6. Prosternum distinctly lobed in front (the lobe very short in Trihaliis.) 



Ti-ibe II. HiSTEiNi, p. 001. 

 hh. Prosternum not lobed in front. Tribe III. Sapklxi. p. 617. 



Tribe I. HOLOLEPTINI. 



This tribe contains in our fauna the single i^'enus : 



I. IIoLOLEPT.v Payk, 1811. (fir., "all + thin.") 



Medium-sized, oblony or nearly s(iuare, very Hat and thin beetles 

 which live usually beneath the close bark of freshly felled poplar, 

 tulip and elm trees. They have the lal)rum deeply and broadly 

 grooved, its apex triangular and strongly bent downward; front 

 tibiffi dentate on the inner edge; aiitcnnal club without distinct 

 cavity for its lodgment, being merely received in a slight depres- 

 sion on the under side of thorax. Two species are known from the 

 State. 



1141 (3460). HOLOLEPTA LUCIDA Lec, P.ost. .Tourn. Nat. Hist.. V, 1845, 37, 

 pi. I, fig. 2. 

 Subquadrale. depressed. Thorax transverse, apex widely eniarsinate, 

 base truncate, hind angles olituse; disk punctured at the sides, the margi- 

 nal stria entire; apical ant^les of male with a deep pit. Elytra with first 

 dorsal stria entire; the second very short, basal; third a mere puncture at 

 base; subhumeral deep, alilireviated at both ends. Length S mm. 



Marion and Posey counties; scai'ce. .Mareh 10-.Vpril21. Taken 

 from beneath cottonwood bark in low damp woods. 



