TlfE PLAT BARK BEETLES. 565 



inmctured but with a faint smooth median Hue on basal half. Elytra deeply 

 striate, not iHnietalc. Eyes almost invisible from above. Length 5-11.5 mm. 



Throughout the State; (•(immon. February L!-Oetiiber 13. Hi- 

 bernates in numbers beneath bark, especially that of sugar maple. 



Subfamily III. CUCUJtNAE. 



The al>sence of the Imrn-like plates concealing the maxilhe is the 

 chief distinction l>etwecn this and the preceding subfamily. The 

 following genera are known to iie repi'esented or may occur in the 

 State. 



KEY TO IXDIANA GKNER.\ OF CUCUJIN.E. 



(/. Head widest behind the eyes; color bright red. V. Crcrjcs. 



aa. Head widest across the eyes. 



6. Body elongate, cylindrical; thora.x margined. Nabthecius. 



1)1). Body depressed. 



c. Antenna' shorter than head and thorax, the latter not margined. 



PEDIACI'S. 



cc. Antenme longer than head and tliorax. 



(/. Tliora.x not serrate at sides, sometimes with a single tooth at 

 front angles. 

 c. Elytra ver.y sliort; thorax not margined. Ino. 



ic. Elytra IdU,;,'; tliorax margined. 



/. First antennal joint aluiut .as long as head. Dendeophagi's. 

 ff. First joint much shorter than head; thorax with an im- 

 pressed line each side of disk. 

 g. Spurs of front tibi:e uneiinal in length. 



yi. E.T:j,IOPHL.ErS. 



gg. Spurs of front tibife equal. Lathropls. 



dd. Thorax distinctly serrate at sides ; first joint of antennae nearly 



as long as the head. yil. Brontes. 



V. CrciT.jT's Fab. ITT.'i. (XL. a word of S(juth .Vmcrican origin.) 



To this genus belongs our largest and most brilliantly colored 

 member of the family. 

 *1077 (3316). Cucx-Jis cl.vvipes Fab., Siiec. Ins.. I, 1TS1. 2.57. 



Elongate, very depressed, sides parallel. 

 Above bright searlet red; beneath duller red; 

 tibiiB and tarsi darker. Antenna; black, equal 

 to head and thorax in length. Head broad- 

 est behind the e.ves. the hind angles being 

 produced outward and backward. Thorax 

 coarsely punctate; disk with three broad, 

 slightly elevated ridges. El.vtra finely punc- 

 tate. Length 10-13.5 mm. (Fig. 21:'.. ) Fig 213. a, larva; c and f, enlarged back 



and side views of its anal joint; d, view of 

 Southern half of State, frertuent; less its head; t, imago. (After Riley.) 



