NEW BARK BEETLES — BLACKMAN 349 



straight and subparallel behind middle, feebly constricted before 

 middle, moderately broadly rounded in front, with anterior margin 

 iather strongly serrate; summit moderate, with a distinct, broad, 

 transverse impression behind it; anterior area with numerous mod- 

 erate asperities, and many short, coarse, clavate or spatulate bristles ; 

 posterior area shining on disk, with small, moderately spaced punc- 

 tures, bearing fine, short hairs or somewhat longer, coarser bristles, 

 surface in impression not so shining, granulate-punctate and dis- 

 tinctly reticulate, with many coarser bristles ; sides granulate-punctate. 



Elytra slightly wider than pronotum and 1.97 times as long, 2.22 

 times as long as wide; sides subparallel on anterior three-fourths, 

 then gradually narrowed and extended to sutural apex ; surface shin- 

 ing, indistinctly reticulate; punctures in definite strial rows, only the 

 first stria distinctly, the others slightly or not at all impressed on 

 anterior disk, all striae impressed toward declivity; interspaces 

 narrow, very finery punctured and bearing both short, fine hairs and 

 longer, spatulate bristles. Declivity convex, summit and sides 

 rounded, striae narrower and more strongly impressed than on disk, 

 punctures smaller and closer; interspaces wider, suture and second 

 interspace scarcely elevated, not granulate, third interspace elevated 

 and granulate, all lateral interspaces more or less granulate, the fifth, 

 seventh, and ninth more strongly than others; all interspaces with 

 numerous conspicuous, suberect, spatulate bristles, some of them, 

 especially on third and fifth interspaces, much longer, with ends 

 tapering but still flattened. 



Fore tibia (pi. 29, fig. 6) of usual type with sides subparallel, 

 outer edge entire, terminal mucro large and slightly hooked; distal 

 end obliquely truncate, with five submarginal teeth. 



Male. — Similar in general habitus to female, but smaller (2.4 mm. 

 long) and slightly stouter (3.03 times as long as wide) ; frons with 

 uniform, short, stout, erect bristles throughout; antenna with scape 

 not so broadly dilated clistally, and with fewer, shorter hairs; vesti- 

 ture more abundant on pronotum and elytra, with bristles more 

 strongly spatulate and often scalelike. 



Type locality. — Huachuca Mountains, Ariz. 



Host. — Unknown. 



Type material. — Holotype, allotype, and eight paratypes, U.S.N.M. 

 No. 56402. 



The holotype was taken September 9, 1938, in the Huachuca Moun- 

 tains, Ariz., by D. J. and J. N. Knull ; allotype and eight paratypes 

 bear the data "Huachuca Mts., Arizona, VII-1-07, Miller Canvon, 

 H. A. Kaeber." 



504078—43- 



