TITE CYLINDRICAL BARK BEETLES. 



Tribe V. CERYLONINI. 



Small oblong or oval flattened beetles haying the Last joint of 

 palpi small and pointed, next to last thick, oval; middle and hind 

 coxae widely separated; first ventral segment as long as the three 

 following; first three joints of tarsi short, together shorter than 

 fonrth. Two genera are represented in Indiana, each by a single 

 species. 



KEY TO GENERA OF CERYLONINI. 



a. Antennae 10-jointed, club composed of a single joint; front coxal cavi- 

 ties closed behind ; tibia? with small terminal spurs. X. Cerylon. 

 an. Antennae 11-jointed, club 2- jointed ; front coxal cavities open behind; 

 tibiae without terminal spurs. XI. Philothermus. 



X. Cerylon Latr. 1802. (Gr., the name of a bird.) 



Head small, deeply inserted ; front coxa? widely separated, pre- 

 sternum broad. 



*1065 (3290). Cerylon castaneum Say, Journ. Phil. Acad. Nat. Sci., V, 

 1826, 259 ; ibid. II, 321. 

 Oblong-elongate, depressed. Dark reddish or chestnut-brown, shining. 

 Thorax nearly square, hind angles rectangular, disk with a slight impres- 

 sion on each side at base, rather coarsely but not densely punctured. Ely- 

 tra scarcely wider than thorax, surface striate, the striae punctured. Length 

 2-3 mm. 



Frequent in the southern half of State ; less so in the northern 

 counties. March 25-December 28. Occurs in winter on the under 

 side of deeply buried logs, and also then and at other seasons be- 

 neath bark of elm and other trees. 



XT. Philothermus Aube. 1838. (Gr., "love + heat. ") 



♦1066 (3291). Philothermus glabriculus Lee, N. Spec. N. Amer. Col.. 

 18G3, 09. 



Elongate-oval, subdepressed. Dark reddish or chestnut-brown, shining. 

 Thorax broader than long, broadest at base; sides regularly curved from 

 apex to base, margin distinctly reflexed; disk sparsely and finely punctate. 

 Elytra not wider than thorax, with rows of rather coarse punctures which 

 are less distinct toward apex. Length 2-3 mm. 



Throughout the State; common. March 12-December 25. Oc- 

 curs beneath bark and rarely beneath stones. 



Tribe VI. MURMIDIINL 



The principal distinctive characters of this tribe, in addition 

 to those given in the key, are the very small oval body, the 10-jointed 



