THE P(.)W1)ER-P()ST BEETLES. <'^'S9 



1687 (5350). BosTEicHUs bicobnis Web., Obs. Ent, 1801, 91. 

 Elongate, subcylindi'ical. Piceous, subopaque, clothed 



with yellowish scales arranged In irregular patches. Tho- 

 rax prolonged in front iu two hooked processes which are 

 serrate, the apex between them truncate; apical region 

 roughly granulate, basal half with smaller granules, me- 

 dian line distinctly impressed. Elytra bicostate, the in- 

 ner eosta stronger ; surface densely and coarsely punc- 

 tured and clothed with yelhiwish scales in patches; tips 

 in male with an acute subsutural spine. Length 7- 

 12 mm. (Fig. 350.) arl'fn ? V^*?' u"l: 



Throughout the State; frequent. June 4^Sep- ^''*-^°'"-^ 

 tember 20. Occurs beneath bark and in oki fungi. 



1688 (5351). BosTKicHtTs abmigeb Lee, New Spec. N. Am. Col., 1866, 100. 

 Form of biconiis, which it closely resembles. Elytra with trace of 



inner costa at base; intervals tuberculate, especially near the suture; sur- 

 face clothed with longer hair-like scales arranged in patches. Length 7.5- 

 9 mm. 



Lake County; rare. July 21. Taken by Uury at Cincinnati. 

 Probably throughout the State. 



1689 (5352). BosTEicnrs truncaticoi,i.is Lee, New Spec. N. Am. Col., I, 



1866, 101. 

 Elongate, subcylindrical. Piceous, subopaque. Thorax slightly longer 

 ,than wide, apex seen from above, truncate, without processes; otherwise 

 as in Mcornis. Elytra without costse or tubercles, surface densely and 

 coarsely punctured and clothed with patches of yellowish appressed hairs. 

 Length 7.5-10 mm. 



Wells, ]\Iarion and Putnam counties; scarce. June 4-July 5. 

 Occurs beneath bark, especially that of sycamore. 



IV. Amphiceriis Lee. 1861. (Gr., "on both sides 4- horn.") 



This genus differs from Bostriclius by having the front of head 

 not margined; joints of antennal club strongly compressed and 

 deeply bistriate from the apical margin ; hind angles of thorax 

 rounded. One of the seven species occurs in Indiana. 



1690 (5356). AiiPHicEEUS bicaudatus Say, Journ. Phil. Acad. Nat. Sci., 



Ill, 1823, 320; ibid. II, 180. 

 Cylindrical, moderately elongate. Piceous-brown, sparsely clothed with 

 recumbent pubescence. Thorax as long as wide, strongly sloping before and 

 behind, the front portion with many small tubercles and with two larger 

 hook-like processes ; the basal half gi-anulate. Elyti-a rather coarsely and 

 irregularly punctured, strongly sloping on apical fourth, the declivity 

 oblique, coai-sely punctured, with moderately long processes each side in 

 male. Length 6.5-9 mm. 



