886 FAMILY XLIV. — BOSTRICHIDJl 



1GS3 ( ). I'TiLiNi's PKUiNosus Casey, Journ. N. Y. Ent. Soc, VI, 1898, 03. 



Form of ruflcoriiis. Uniform black, oijaque, antennsB and legs reddish- 

 brown. Branch of third antennal joint one-half longex- than the joint Tho- 

 rax a little narrower than elytra, the side margins plainly serrulate through- 

 out, median line finely impressed its full length, the small basal smooth 

 protuberance obsolete. Elytra three-fourths longer than wide, male, or 

 scarcely three-fifths longer than wide, female. Length 3-3.5 mm. 



Lake County; rare. May 20. Casej^'s types were from "Indi- 

 ana" and Fall recognizes the species from Ontario. 



Family XLIV. BOSTRICHID.E. 



The Powder-post Beetles. 



This family, as here limited, consists of elongate, robust or slen- 

 der species having the antennas 9- to 11- jointed, inserted at the sides 

 of the front; eyes small; labrum distinct; elytra ■ entire ; abdomen 

 with five free ventral segments ; front coxse prominent, contiguous, 

 but little extended transversely; tarsi 5-jointed, the first joint very 

 short and imperfectly separated from the second. AH the species 

 live in dry wood, either in ej-Jindrieal burrows or beneath the bark, 

 and sometimes in such numbers that the timber is wholly destroyed 

 by them. About 4") species of the family are kno-nii from North 

 America. These are divided among two subfamilies, both of which 

 are represented in the Htate. They diflier widely in character and 

 are placed together more for convenience and similarity of habits 

 than on structural grounds. 



The principal papers treating of the North American species of 

 these subfamilies are as follows: 



fl^or?;.— "Revision of the Species of the subfamily Bostrichida? 

 of the United States," in Prop. Anier. Phil. Soc, XVII 

 1878, 540-555. 



rV/,.se.i/.— "Coleopterological Notes— III," /;, Ann. N. T. Acad. 

 Sci., VI, 1801, 12-16. A synoptical table of the genus 

 Lyctns is given. 



KEY TO SUBFAMIMES OF B0STRICHID.ai;. 



a. First ventral segment scarcely longer than those which follow; an- 

 tennal clnb 3- or i-jointed. Subfumily I. Bostrichin^, p' SS(1 

 aa. First ventral segment much longer than the others ; antennal club two- 

 ^°'"*'^- Subfamily II. Lyctin.-e, p. 891. 



Subfamily I. BOSTRICHINAE. 

 Rather robust, oblong or elongate species, having the head usu- 

 ally deflexed and protected by the thorax; antenna widely sepa- 

 rated and inserted immediately in front of the eves, upon or tinder 



