6GG 



FAMII-Y XXIX. MONOTOMITVE. 



Putnam County; rare. September 7. Readily known by the 

 brassy tinge and the yellow spot on elytra. Occurs on foliage of 

 the laurel or shingle oak, Qucrcus imbricaria Michx. 



Peltis ferruginea Linn, and Calitys scabra Thunb., both mem- 

 bers of the boreal fauna, have been recorded from Michigan. 



III. GRYNOCHARIS Thorn. 1859. (Gr., " fire-brand + rejoice. ") 



Oval, subdepressed beetles, having the margins of thorax and 

 elytra flattened; front truncate; antennal grooves feeble; front 

 tibia? without a terminal hook. Three species are known from the 

 United States, one of which has been taken in Indiana. 



1278 (3851). GRYNOCHARIS 4-LiNEATA Melsh., Proc. Phil. Acad. Nat. Sci., 

 II, 1844, 104. 



Oblong-oval, subdepressed. Black, feebly shining ; an- 

 tennae and under parts piceous. Thorax twice as wide 

 as long, slightly wider at base than apex, hind margin 

 truncate ; sides nearly straight, margins reflexed, hind 

 angles obtuse ; disk alutaceous, finely and sparsely punc- 

 tate and with a transverse impression behind the mid- 

 dle. Elytra oblong, sides parallel, each with four nar- 

 row costae ; intervals each with three or four rows of 

 coarse punctures. Length 6 mm. (Fig. 248.) 



Lawrence County ; rare. April 13. Occurs be- 

 lg (0rfgmaio neath loose bark of walnut and oak. 



Family XXIX. MONOTOMIDJE. 



THE MONOTOMID BEETLES. 



To this family belong a few small, depressed beetles, resembling 

 rather closely those of certain genera of the family Cucujidas and 

 also those of the genus Rhizopbagus of the Nitidulidae. They live 

 beneath the bark of trees or in the nests of ants. The word Mono- 

 toma means literally "a single cut," and probably refers to the 

 small subapical tooth of the mandibles. 



From closely allied families they may be separated by having 

 the antennas 10-jointed, inserted under the sides of the front, the 

 last one or two joints enlarged to form a club ; front coxae small 

 and round, the cavities widely closed behind; elytra truncate be- 

 hind, leaving the last dorsal segment exposed; abdomen with five 

 free ventral segments, the first and fifth elongated, the others 

 shorter and equal ; tarsi three-jointed, the last joint longer than the 

 others united. 



