238 Natural History Bulletin. 



from the base is a fine transverse sulcus; a rounded fovea is 

 in the middle; lateral fove^ small. Elytra one-fourth longer 

 than the prothorax across the high, prominent shoulders, and 

 not quite double the length across the hips. Disk finely punc- 

 tulate, impressed lines and two basal foveas deep, the sides 

 slightly arcuate. Ahdomen but little longer than the elytra, 

 and narrower at the base than across the posterior margin of 

 the first segment, which is almost imperceptibly longer than 

 the second. Margins very broad, retuse, a minute tubercle in 

 the middle of the base. Legs strong, middle trochanters with 

 a strong, blunt spine at the ends, anterior tibia; with a short, 

 spinulate submedian carina. Male with the last dorsal emar- 

 ginate at tip, last ventral slightly impressed, punctured, these 

 characters being wanting in the female. The male has also 

 the posterior tibia; more arcuate. 



Habitat. Eastern slope of the United States. 



T. corticixus, Casey. Brown, elytra red, abdomen piceous- 

 black, pubescence fine, short, appressed. Length 2 to 2.2 

 mm. Plate VI., Fig. 20. 



Head., eyes included, slightly longer than wide, frontal tuber- 

 cles quadrate, separated by a fine line which is connected with 

 an obloncr frontal fovea. There are also two small fovece 

 between the eyes. AntcnncB more than half as long as the 

 body, joint one long and conical, two smaller, of the same 

 form, three to seven subequal, only very slightly decreasing 

 in size. The eighth joint is the smallest and is quadrate, the 

 ninth is as long as the two preceding together, obconical, 

 longer than w^ide, the tenth is larger, of the same form as the 

 ninth. The eleventh is ovate, one-half wdder and twuce as long 

 as the tenth. Palpi wuth the second joint long, clavate, arcuate, 

 third shorter, obovate, as thick as the club of the second; fourth 

 not thicker than the third and twice as long, fusiform, pointed 

 at both ends with a loner terminal seta. Prothorax about as 

 wide as long, widest one-third from the neck, where the sides 

 are rounded; from this point the sides are nearly straight 



