THE CYLINDRICAL; BARK BEETLES. 



553 



eighth. Thorax one-third broader than long, sides feebly curved, from 

 angles prominent, hind ones rounded; margins flattened, finely eremite; 

 disk coarsely and roughly granulate and with four raised lines, the outer 

 one on each side curving around the apex, the inner ones joined to the 

 curve but not to each other, the interval between them wider than in quacl- 

 riguttata. Elytra not wider than thorax, each with four discal ridges, in- 

 tervals not punctate but each with two or three rows of small oblong gran- 

 ules. Length 3.4 mm. 



Marion County ; rare. May 29. Described from a single speci- 

 men taken by H. Morrison from beneath bark. Broader than quad- 

 riguttata, elytra not marked with red as there, and with the in- 

 tervals granulate instead of coarsely punctured. 



D. quadricollis Horn, narrower than qiiadriguttata, dark brown, 

 length 2.5 mm., is listed by Dury from Cincinnati. 



Eudesma undulata Melsh., elongate, subcylindrical, piceous, 

 length 5 mm., has also been taken by Dury. who found them running 

 up and down and burrowing in the bark of a buckeye log. 



IV. CoxELUsLatr. 1829. (L., "coxa.") 



Antennas as in I) i Ionia but received in grooves beneath the eyes ; 

 front coxal cavities closed behind. One species occurs in Indiana. 



*1058 (3261). Coxelus guttulatus Lee, New Spec. N. Amer. Col., 18G3, 65. 



Elongate-oblong, subconvex. Piceous-black ; antennae, legs and margins 

 of thorax and elytra dull reddish -brown. Thorax twice as wide as long, 

 apex deeply emarginate. front angles prominent ; sides broadly curved ; 

 margins wide and flat, edges finely serrulate; surface coarsely granulate. 

 Elytra with rows of coarse granules, and each also with spots of coarse 

 gray pubescence forming an interrupted sinuous band near middle and an- 

 other subapical. Length 4-5 mm. 



Southern half of State; frecpuent. February 10-November 19. 

 Occurs on dry fungi and beneath close fitting bark of beech, maple 

 and other trees. 



Lasconotus borealis Horn, thorax wider than long, elytra equally 

 costate, piceous, length 2.5-3 mm., is known from Michigan, while 

 L. pusillus Lee, thorax longer than wide, elytra broadly channeled, 

 fifth interval strongly elevated, color and size the same, has been 

 recorded from Cincinnati. 



Tribe II. COLYDIINI. 



Elongate, cylindrical beetles having the head horizontal; an- 

 tennas capitate, retractile; front coxal cavities narrowly closed be- 

 hind; first joint of tarsi as long or longer than the next two to- 

 gether, the three longer than the fourth. They occur beneath bark. 

 Two genera are represented in the State. 



