888 



FAMILY XLIV. — BOSTRICTIID/E. 



late. Elytra with small granules arranged in a network of lines, the spaces 

 between them smooth, their summits with pale brown hairs. Length 4- 

 4.5 mm. 



Southern half of State; common. March 9-December 21. Hi- 

 bernates. Occurs on woody fungi and beneath bark of trees and 

 shrubs; also at maple sap in spring. 



II. Sinoxylon Dufts. 1825. (Gr., "harm + wood. ") 



Cylindrical beetles having the head completely concealed from 

 above by the thorax, which is truncate in front, with the apical half 

 covered with small tubercles ; elytra obliquely truncate behind, their 

 surface punctate. One of the eleven species occurs in the eastern 

 United States and Indiana. 



1686 (5339) 



Acad. Nat. Sci., III. 



Fig. 349. 



Sinoxylon basilaee Say. Jonrn. Phil. 

 1823, 121 ; ibid. II. 181. 



Cylindrical. Black ; elytra dull red- 

 dish-yellow on basal third. Antenna? 

 10-jointed ; last two joints of maxillary 

 palpi equal. Thorax very convex, slop- 

 ing downward on apical half, angles 

 rounded ; surface densely punctate, and 

 with numerous small tubercles in front. 

 Elytra bent downward nearly at right 

 angles on apical fourth, with three tu- 

 bercles on each side of the declivity, the 

 Length 5.5-6 mm. (Fig. 349.) 



a, larva; b, pupa; c, beetle. 

 (After Riley.) 



latter coarsely punctured 



Fayette, Lawrence and Posey counties ; scarce. May 23-August 

 23. Occurs beneath the bark of hickory, to the wood of which it is 

 said to be very destructive. 



III. Bostrichus Geoff. .1764. (Or., " : hooked + hair. ") 



Elongate, subcylindrical species, having the joints of the anten- 

 nal club short, subglobose ; hind angles of the thorax acute and 

 prominent. Three of the five known species have been taken in the 

 State. 



KEY TO INDIANA SPECIES OF BOSTEICHUS. 



a. Thorax with two hooked processes in front. 



&. Elytra with two costa?, the surface clothed with patches of small ap- 

 pressed scales. 1687. bicornis. 



IjIj. Elytra with one short basal costa, the surface clothed with hairs 

 which are unevenly disposed in clusters. 1688. armiger. 



an. Thorax in front simply truncate; pubescence of elytra in spots irregu- 

 larly arranged; elytra without traces of ridges. 



1689. TRUNCATICOLLIS. 



