THE SHIP-TIMBER BEETLES. 



805 



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. Not represented in the collection at 

 hand. 



II. Lymexylon Fab. 1775. (Gr., "destroyer + wood. ") 



This genus is also represented in the eastern United States by 

 but one species. 



1699 (5385). Lymexylon sericeum Harr., Ins. Mass., 1838, 52. 



Elongate, slender, subcylindrical. Pic- 

 eous brown, clothed with very fine, silky, 

 yellowish pubescence ; antenna?, 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, surface 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. 



Micromalihus debilis Lee, elongate. Fig. 352. (Original.) 



piceous, shining, antenna? and legs yellow, length 2.2 mm., was 

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

 decaying wood. 



Family XLVII. CIOIDiE. 



The Minute Tree-fungus 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 by 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] 



