258 GEO. H. HOKN, M. D. 



rowed to base, more obliquely narrowed in front, margin crenate, sparsely ciliate, 

 a feeble channel along the basal margin externally, coarsely and closely pnnc- 

 tate, the punctures denser near the sides, those of the disc umbilicate, median 

 line smooth, feebly elevated. Elytra rugulose at middle, the punctures distinct 

 along the ba.se and sides which are finer than those of the thorax and closely 

 placed, sutural costa well marked, first discal distinct, but not prominent, the 

 other discal costiB obliterated, submarginal distinct posteriorly. Pygidium 

 coarsely not closely punctate. Metasternuni densely punctured, the hair mod- 

 erate in length but not dense. Abdomen si)arsely rather finely punctate, the 

 last two segments more coarsely. Claws curved, the tooth stout, long and median. 

 Last joint of maxillary palpi elongate, cylindrical, not impressed. Length .80 

 —.90 inch; 20—23 mm. 



Male. — Antennal club nearly as long as the stem. Abdomen 

 flattened and somewhat concave, penultimate ventral (fig. 38) slightly 

 concave and granulate at middle and on each side an oblique obtuse 

 ridge. Last ventral feebly concave, longitudinally impressed at 

 middle, a slight emargination at apex. Inner spur broad and stout, 

 moderately long, the outer long, broadest at middle. 



Female. — Club of antennae shorter than the funiculus. Penulti- 

 mate segment narrowly impressed parallel with the posterior margin. 

 Last ventral with a rather broad and deep, abrupt emargination. 

 Hind tarsi slightly shorter than in the male. 



Variations. — A slight variation in color has been observed, but 

 the sculpture seems very uniform. In the males the oblique carinse 

 on each side of the penultimate ventral, although generally separate, 

 sometimes extend and meet in front of the depression. 



This insect has exactly the form of Knochii, and has the thorax 

 as little convex. By the table which precedes it is also allied to 

 rugosa, which has a more convex thorax, the punctures less densely 

 and rather irregularly placed. 



Occurs in Texas. For specimens compared with the type we are 

 indebted to Mr. A. Salle, of Paris. 



44. li. rugosa Mels.— Oblong, broader behind, moderately robust, rufocasta- 

 neous to piceous, shining. Clypeus acutely, moderately deeply emarginate, bor- 

 der narrowly reflexed, densely, moderately coarsely punctate, front rather more 

 coarsely punctate. Thorax widest at middle, obtusely angulate, distinctly nar- 

 rowed at base, more obliquely narrowed in front, margin crenate, sparsely ciliate, 

 a slight depression of the base opposite the middle of each elytron, disc convex, 

 the punctures coarse and deep, moderately closely, although somewhat irregularly 

 placed, the median line and sometimes a space each side smoother. Elytral punc- 

 tures finer than those of the thorax, very closely placed, somewhat rugulose each 

 side of the suture, the sides and apex smoother, the discal costpe. moderately dis- 

 tinct, the submarginal distinct in its posterior half. Pygidium with coarse 

 sparsely placed punctures. Metasternuni densely punctate, the liair moderately 



