48 GEO. H. HORN. M. D. 



L<. abruptus Say. — Form moderately robust, male more slender black, shin- 

 ing, clothed with fine black sericeous pubescence. Antennae serrate, attaining the 

 tips of the hind angles of the thorax in the male, shorter in the female. Head 

 convex, coarsely not closely punctate. Thorax as wide as long in the female, 

 somewhat narrower in the male, sides arcuately narrowing to the front, lateral 

 margin not visible from above in front, hind angles not divergent, carinate, disc 

 convex, shining, rather coarsely not closely punctate. Elytra not wider than the 

 thorax, sides gradually arcuately narrowing to apex, the tips conjointly roundedr 

 sutural angle not prominent, surface sub-striate, rather densely sub-muricately 

 punctured. Body beneath shining, the punctuation similar to that of the thorax 

 above. Length .62-.80 inch ; 15.5-20 mm. 



Although not a common species, it is represented in nearly all collections, 

 and is sufficiently well known. The characters in the table give, in a 

 summary manner, the differences between this and our other black 

 species. 



Occurs in Middle, Southern and Western States. 



li. texanus Lee. — Form moderatel}' robust, brownish castaneous, moderately 

 shining, moderately densely clothed with short, yellowish brown, recumbent pu- 

 bescence. Antennse longer than the thorax in the male, shorter in the female. 

 Head coarsely and moderately closely punctate. Thorax as wide at base as long, 

 a little narrower in the male than in the female, sides straight at posterior two- 

 thirds, arcuate, in front, gradually narrower from base to apex, lateral margin not 

 visible from above in its anterior extent, hind angles slightly divergent, carinate, 

 disc convex, coarsely and moderately closely punctate. Elytra not wider than the 

 thorax gradually arcuately narrowing to apex, the tips conjointly rounded, sutural 

 angle not prominent, disc finely striate, strise coarsely not closely punctate, intervals 

 flat, densely sub-muricately punctured in the male, more sparsely punctate in the 

 female. Flanks of prothorax beneath coarsely punctured and sub-opaque, pros- 

 ternum more coarsely and sparsely punctate. Abdomen sparsely punctate, quite 

 finely at middle, more coarsely at the sides. Length .62-.80 inch ; 15.5-20 mm. 

 The differences in elytral sculpture between the sexes are well marked ; 

 it will, however, be observed that the Cape San Lucas specimens are, sex 

 by sex, less punctate than those from Texas. 

 Occurs from Texas to Cape San Lucas. 



It. Iiepaticus Germ. — Form moderately robust, male usually more slender, 

 brownish castaneous or ferruginous, moderately densely clothed with semi-erect 

 yellowish brown pubescence. Antennse serrate, in both sexes extending lieyond 

 the hind angles of the thorax, longer in the male. Head coarsely moderately 

 closely punctate. Thorax distinctly longer than wide and narrower in the male 

 than in the female, sides nearly straight and convergent at posterior two-thirds, 

 arcuate in front, lateral margin not visible from above except near the hind angles, 

 these not divergent, strongly carinate, disc conxex, coarsely not densely punctured. 

 Elytra not wider than the thorax, gradually arcuately narrower to apex, tips con- 

 jointly rounded, sutural angle not prominent, disc finely striate, strise rather 

 coarsely not closely punctate, intervals flat, moderately closely sub-muricately 

 punctured in the male, more sparsely in the female. Body punctured beneath as 

 in texanus. Length .62-. 70 inch; 15.5-17.5 mm. 



