TRIBE IV. COSSONINI. 531 



longer than broad, sides almost parallel at middle, disc unequally punc- 

 tured, rather finely at sides, coarsely in median area. Elytra but slightly 

 wider than thorax, striae rather coarsely, serrately punctured; intervals 

 feebly convex, very minutely uniseriately punctured. Length 4.5 7 mm. 



Not yet identified from Indiana. Ranges from the "Middle 

 States to Nebraska and Kansas, and from the Lake States to 

 Montana, Washington and California. Apparently confined to 

 broad-leaved trees." (Van Dyke.) 



831 (9029). COSSONUS IMPRESSUS Boh., Schb'n., 1838, 1019. 



Black, piceous or rufous, shining. Head smooth; beak rather finely 

 and sparsely punctate, scarcely half as long as thorax, basal portion about 

 as long as apical, which is quadrilaterally dilated and broader than long; 

 vertex with a deep, impressed linear puncture. Thorax longer than broad, 

 convergent until near apex, rather closely punctured at sides, more coarsely 

 in triangular depression at base, through which extends a smooth 

 carina which is a little less than one-third the length of thorax. Elytra 

 not wider than thorax, strias coarsely, serrately punctured; intervals 

 rather flat, indistinctly punctate. Length 3 3.5 mm. 



Southern Florida, Cuba, Jamaica and Central America ; the 

 more southern specimens darker. 



832 (9026). COSSONUS CONCINNUS Boh., Schon., 1838, 1006. 



Elongate, subcylindrical. Black, shining, antennas and tarsi piceous. 

 Beak less than half as long as thorax, finely and rather densely punctate, 

 basal portion with a short groove and about equal to apical, the latter 

 abruptly dilated, much wider than long. Thorax slightly longer than 

 broad, sides feebly curved, more strongly near apex; disc convex, with a 

 rather large triangular impression at middle of base, coarsely, evenly and 

 rather densely punctured, the basal depression cribrate and often with a 

 faint carina. Elytra not wider than thorax, deeply striate, stris coarsely 

 serrately punctured; intervals very narrow, convex, each with a row of 

 minute punctures. Length 3.5 5.5 mm. 



Common throughout Indiana ; Jan. 18 Nov. 5. Occurs be- 

 neath bark of butternut, sycamore and other trees, often in com- 

 pany with platalea. Bronxville, N. Y., July, under woody fun- 

 gus on oak stump. Many localities in New Jersey; May Au- 

 gust. Ranges from Canada to Florida, west to Missouri, under 

 bark of chestnut and other hardwood trees. Both this species 

 and the next have the antenna 1 funicle much stouter than in 

 those which precede, the outer joints wider, the last one-half to 

 two-thirds the breadth of the club. 



G. impressifrons Boh. (1838, 100) is a form in which the thorax is 

 evidently narrower than elytra, flatter, with the sides more convergent in 

 front, and with more distinct median carina, but this form grades in- 



