THE LAMELLiCOliX l'.KKTLKS. 



979 



bb. Clypeus entire, rather deeply concave, not extended on to the eye at 

 base; elytra with abundant erect hair; color pale brownish- or 

 reddish-yellow. 1835 - tbistis. 



aa. Antennas 9-jointed; hind angles of thorax distinct; clypens emarginate. 

 d, Surface shining. inepta. 

 del. Surface subopaque or iridescent. quercus. 



1833 (5789). Lachnosteena crenulata Frohl., Naturforscher, 1792, 94. 

 Oblong, robust, very little wider behind. Brown, feebly shining, sur- 

 face clothed with very short yellowish recumbent hairs, often with erect 

 hairs intermingled. Clypeus feebly emarginate, surface coarsely and closely 

 punctate, with short, erect hairs. Thorax with side margins coarsely ser- 

 rate ; surface coarsely and rather densely punctate, with rather long, erect 

 yellowish hairs and with the median smooth line interrupted. Elytral 

 punctures much finer than those of thorax, evenly and rather closely placed ; 

 submarginal costa? well marked and entire. Male with antennal club as 

 long as funicle ; fifth ventral segment vaguely concave at middle ; hind tibia? 

 with both spurs free. Length 17-20 mm. (PI. II, fig. 388.) 



Lake, Porter, Owen and Vigo counties ; frequent. Probably oc- 

 curs throughout the State. May 7-June 29. A more narrow and 

 parallel form than ilicis, with the hairs of thorax erect and not re- 

 cumbent as there. 



1834 (5790) . Lachnosterna albina Burm., Handbuch Entoin.. IV. 1855, 328. 

 Oblong-oval, distinctly broader behind. Brown, moderately shining. 



rather densely clothed with white hairs. Clypeus emarginate, densely punc- 

 tured and with short, erect hairs, which become longer on the front. Tho- 

 rax with sides obtusely angulate, the margins entire ; surface rather closely 

 and coarsely punctate, without smooth median line. Elytra nearly as 

 coarsely but less densely punctured than thorax; cost;e well marked, the 

 whitish pubescence with a few erect hairs. Male with antennal club a lit- 

 tle longer than the funicle; ventral segments slightly flattened at middle. 

 Female with club distinctly shorter than funicle. Length 15-18 mm. (PI. 

 Ill, fig. 393.) 



Marion County; scarce. May 22. Occurs on the flowers and 

 leaves of the red haw, Crataegus, in low, open woods. A rare form, 

 known only from Ohio, Indiana and Mississippi. Easily recognized 

 by the conspicuous white pubescence of the surface. 



1835 (5796). Lachnosterna tristis Fab., Spec. Ins.. I, 1781, 39. 

 Oblong-elongate, or slightly oval, a little broader be- 

 hind. Light to dark, dull brownish-yellow, sparsely clothed 

 with short, semi-erect hairs on elytra, with longer, erect 

 yellowish hair on thorax and base of elytra. Clypeus en- 

 tire, concave, coarsely and sparsely punctured, not pro- 

 longed at sides on the eyes. Thorax with margins entire. 'J, 

 fringed with long hairs, disk coarsely and rather closely < . 

 punctured. Elytra evenly and rather closely punctured. J\ 

 the costa? obsolete. Male with antennal club slightly ; 

 longer than stem ; N abdomen flattened at middle; fifth seg- Fig. 375. x if. 

 ment with a short, transverse acute ridge near the front (After Knobel.) 



