THE DEATH-WATCH AND DKIKi STORE BHUTLKS. 871 



VII. TRICHODESMA Lee. 1861. (Gr., "hair + band.") 



The members of this genus are readily known from all other 

 Ptinidic by their oblong, convex bodies, which are densely pubescent 

 and ornamented with tufts of erect hairs. The antennas are 11- 

 jointed, the three outer joints large, elongate and together as long- 

 as the preceding united; front and middle coxa? widely separated, 

 the prosternum broadly truncate behind. One species is frequent 

 in Indiana, while another may occur in the southern counties. 



1656 (5277). TRICHODESMA GIBBOSA Say, Journ. Phil. Acad. Nat. Sci., V, 



1825, 171 ; ibid. II, 280. 



Oblong, moderately robust, densely clothed, except on basal thirds of 

 thorax and elytra, with grayish-white recumbent hairs. Thorax slightly 

 narrower than elytra, sides feebly curved and convergent near hind angles, 

 which are broadly rounded ; disk strongly swollen, surface densely granu- 

 late, each granule bearing a long, fine erect hair ; the summit of the disk 

 with a divided tuft of brown and brownish-yellow hairs, and in front of 

 this two smaller similar tufts. Elytra with coarse punctures arranged in 

 somewhat irregular rows and numerous small granules which are more 

 conspicuous on basal third; the grayish-white appressed hairs form a broad 

 oblique band just behind the middle; each elytron with two elongate tufts 

 uf brownish hairs in front of middle and four smaller tufts in a curved 

 row on apical fourth. Length 4.5-6.5 mm. 



Throughout the State ; frequent. May 26 July 5. Occurs most 

 commonly on foliage of hickory, maple and redbud. 



T. Jdagesi Fall, having the pubescence of elytra less dense and 

 hairs of elytra tufts uniformly blackish-brown, is known from Ohio 

 and Kentucky. 



AHobium striatum Oliv., elongate, subcylindrical, brown, opaque, 

 length 2.7-4 mm., is a true "death- watch beetle" which is common 

 to Europe and America. 



VIII. HADROBREGMUS Thorn. 1859. (Gr., " thick + head.") 



Elongate, subcylindrical species covered with fine, short, re- 

 cumbent pubescence ; front and middle tarsi widely separated, the 

 antennae in repose received between them. Our species have the 

 antenna? 10- jointed, the three outer joints elongate, together longer 

 than all the preceding. Two species have been taken in Indiana, 

 while another doubtless occurs. 



KEY TO INDIANA SPECIES OF HADROBREGMUS. 



a. First ventral suture straight, the second segment not quite as long as 



fifth ; size larger, 3.5-7 mm. 



&. Disk of thorax slightly gibbous or humped, compressed behind, sides 

 converging and usually feebly sinuate behind the front angles. 



1657. CARINATUS. 



