400 Coleopterological Notices. 



line of still finer and extremely widely spaced punctures, which are generally 

 simple, hut which laterally toward apex become very coarse sparse asperities. 

 Total length 30.5 mm.; width 10.0 mm. 



Texas (El Paso). Mr. G. W. Dunn. 



The single type is a male and represents a very distinct species, 

 combining' the characters of gracilis and lucse. The legs are long 

 and extremely slender, the anterior femur with a strong spiniform 

 tooth. The prothorax is almost as in gracilis, but is longer, while 

 in the male the elytra are prolonged by a caudal appendage which 

 is nearly one-fourth as long as* the elytra. From lucse it differs iu 

 its small dentiform and everted apical angles of the prothorax, and 

 more feeble apical emargiilation. 



As a very singular character, it will be noted that it is the very 

 inconspicuous punctures of the intervals which become, toward the 

 sides of the apical portions,, the large strong and very conspicuous 

 asperities, the fine punctures of the regular series remaining almost 

 unmodified, but becoming slightly asperate very near the apex and 

 on the caudal prolongation. 



E. slllJCylilldricUS n. sp.- — Form cylindrically convex, rather slender, 

 finely very strongly alutaceous and smooth throughout, black ; elytra casta- 

 neous. Head moderate, sparsely and rather finely punctate ; antennae rather 

 long and slender, about as long as the head and prothorax, third joint nearly 

 four times as long as wide. Prothorax subcylindrical, about one-fifth wider 

 than long, transversely moderately but very evenly convex throughout, longi- 

 tudinally very feebly convex ; apex very nearly as wide as the base, subtrun- 

 cate between the acute, very strongly advanced but not at all everted apical 

 angles ; base broadly, very feebly arcuate, the angles obtuse, not in the least 

 rounded, not at all prominent ; sides evenly and feebly arcuate throughout ; 

 disk very sparsely and extremely minutely punctate throughout. Elytra more 

 than three times as long as the prothorax and rather less than one-third wider ; 

 base very feebly emarginate, exactly equal in width to the contiguous base 

 of the pronotum ; apex narrowed rather gradually in apical third, acutely 

 rounded at tip ; sides feebly convergent and arcuate near the humeri, parallel 

 and almost perfectly straight thence to posterior third ; humeri very obtuse, 

 not rounded, not at all prominent ; disk with unimpressed distant rows of very 

 small, nearly simple punctures, the intervals with single rows of extremely 

 widely distant but almost similar punctures, the punctuation not denser 

 toward the sides. Legs long and very slender ; anterior femora with a small 

 but acute tooth slightly beyond apical third, the remaining femora simple but 

 with the groove of the lower edge fine, very deep and conspicuous, extending 

 almost to the base, with the cariniform edges finely, unevenly serrate ; tibiae 

 strongly arcuate, spurs of the anterior short, nearly equal and slender. 

 Length 21.0-23.0 mm. ; width 7.5-7.8 mm. 



