THE FLAT BxVRK BEETLES. 



565 



punctured but with a faint smooth median line on basal half. Elytra deeply 

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



Throughout the State; common. February 2-October 13. Hi- 

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



Subfamily III. CUCUJINAE. 



The absence of the horn-like plates concealing the maxillae is the 

 chief distinction between this and the preceding subfamily. The 

 following genera are known to be represented or may occur in the 

 State. 



KEY TO INDIANA GENEKA OF CUCUJIN.E. 



v. cucujtjs. 

 Narthecius. 



a. Head widest behind the eyes ; color bright red. 

 aa. Head widest across the eyes. 



6. Body elongate, cylindrical ; thorax margined. 

 hi). Body depressed. 



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



Pediacus. 



<■<■. Antenna* longer than head and thorax. 



d. Thorax not serrate at sides, sometimes with a single tooth at 

 front angles. 



e. Elytra very short ; thorax not margined. Ino. 

 ee. Elytra long ; thorax margined. 



/. First antennal joint about as long as head. Dendrophagus. 

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

 pressed line each side of disk. 

 g. Spurs of front tibiae unequal in length. 



VI. Lemophleus. 



gg. Spurs of front tibia? equal. Lathropus. 

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

 as long as the head. VIE Brontes. 



V. Cucujus Fab. 1775. (NL., a word of South American origin.) 



To this genus belongs our largest and most brilliantly colored 

 member of the family. 



*1077 (3316). Cucujus clavipes Fab., Spec. Ins.. I. 1781, 257. 



Elongate, very depressed, sides parallel. 

 Above bright scarlet red : beneath duller red : 

 tibiae and tarsi darker. Antennse black, equal 

 to head and thorax in length. Head broad- 

 est behind the eyes, the hind angles being 

 produced outward and backward. Thorax 

 coarsely punctate: disk with three broad, 

 slightly elevated ridges. Elytra finely punc- 

 tate. Length 10-13.5 mm. (Fig. 213.) 



and side views of its anal 



Southern half of State, frequent ; less its head; 6, imago. (After 



Fig 213. 



e, enlarg 

 joint; d, 

 Riley.) 



