THE SHIP-TIMBER BEETLES. 



895 



Of the basal joints dull yellow. Body punctured, with short hairs; thorax 

 with an indented line; scutel glabrous and carinate in the middle; elytra 

 with slightly elevated lines. Length 10-12 mm. 



The above is a modification of Say's original description. He 

 took it from the vicinity of New Harmony, where he "observed it 

 in considerable numbers on the 16th of April, flying about a pros- 

 trate sugar maple and running briskly upon it. It is infested by 

 a species of " Gamasus," (mite). A variety has the elytra dull 

 yellowish on the basal half. Xot represented in the collection at 

 hand. 



II. Ltmexyuix Fab. 1775. (Gr., "dc-^troyer h wdod.") 



This genus is also represented in the eastern United States by 

 but one species. 



1600 (53S5). Lymexylon sericeum Harr., Ins. Mass., ISoS, 52. 



Elongate, slender, subcylindrical. Pic- 

 eous brown, clothed with very fine, silky, 

 yellowish pubescence; antennse, under sur- 

 face, tibiae and tarsi, paler. Antennae short, 

 half the length of head and thorax ; third 

 joint longest, 5th to 10th bead-like. Thorax 

 twice as long as wide, broadly rounded in 

 front, hind angles rectangular ; disk strongly 

 convex on basal half, surf ace . densely and 

 rather coarsely punctured. Elytra with sides 

 nearly parallel, their surface finely, densely 

 and irregularly punctate. Length 11-13.5 mm. 

 (Fig. 352.) 



Lake and Crawford counties; rare. 

 June 29-July 21. Taken from beneath 

 loose bark of oak logs. 



3IicromaUhus debilis Lee, elongate, ''*'*52- (Original.) 



pieeous, shining, antenna and legs yellow, length 2.2 mm., was 

 described from Detroit, Michigan, where it occurred in August in 

 decaying wood. 



Family XLVII. CIOID.B. 



The Minute Tree-pungus Beetles. 



Very small, subcylindrical black or brownish beetles, rarely ex- 

 ceeding 3 mm. in length, and having the head retracted, but not en- 

 tirely concealed l)y the prolonged thorax. In the males of some 

 species the head and front margin of thorax are ornamented with 

 small, horn-like processes. The family name comes from that of the 



[57—23402] 



