162 JOHN L. LECONTE, M. D. 



16. X. &Sa.'ber.=Bostrichus afaber Mannh. Bull. Mosc. 1852, 359. 



Alaska and l^ake Superior. Differ.s from the preceding by its 

 smaller size, and by the prothoras being slightly asperated in front. 



17. X. granicoUis. — Ferruginous, elongate cj'lindrical, sparsely clothed with 

 erect hairs; head with a fewgrahules and punctures; prothorax longer than wide, 

 densely granulate on the whole surface, scarcely more strongly in front than 

 behind, smooth dorsal line narrow, scarcely visible; elytra with rows of large 

 quadrate punctures, intervals narrow, with single rows of small punctures ; su- 

 tural stria well impressed, tip obliquely declivous, not flattened, but slightly 

 retuse from the depth of the subsutural furrow. Long. 2 mm. 



One specimen found in the mountains of Sullivan county, Penn- 

 sylvania. Much resembles in its sculpture Crypturgus sfriatulus Lee, 

 but differs totally in the form and structure of the antennal club. 



TOMICTJS Latr. 



This genus in its most restricted sense corresponds with the sub- 

 genus Bostri/chus of Dr. Zimmermann, and is easily recognized by the 

 antennal club being corneous on the posterior face, and divided on the 

 other side by sutures which are angulated or sinuate, the principal con- 

 vexity of the suture being directed forwards; the funiculus is always 

 composed of five distinct joints, and the tibiae are strongly toothed. 

 The declivous portion of the elytra is deeply excavated, the excavation 

 is margined behind, the margin extends to the suture a little in front 

 of the sutural angle, and is strongly toothed at the sides; the punctures 

 are arranged in distant rows, the intervals broad and flat, sometimes 

 marked with a few punctures, sometimes smooth. 



According to the form of the sutures of the antennal club, our 

 species represent three divisions : 



A. — Sutures of the club angulated, the point of the angle directed 

 forwards. 



1. T. calligraphus Germ. Ins. 'Sov.A&l-^Bostrichusexesus Say; ? Tomicus prce- 

 morsus Eichhoff. Berl. Ent. Zeitschr. 1867, 401. (Ante, p. 147 = .B. e.vesus.) 



A larger form, 7 mm. long, occurs in New Mexico. 



2. T. cacographus. — Cylindrical, dark-brown, or ferruginous, sparsely clothed 

 with long yellow hairs; similar in sculpture to the preceding, but a little more 

 slender in form; the disc of the prothorax behind the middle is feebly punc- 

 tured, the punctures of the elytral striae are transverse, and those of the inter- 

 vals are well marked ; the posterior excavation is armed each side with but five 

 teeth, of which the most anterior one is very small, the 3d large, 2d still larger, 

 4th and 5th moderate in size, the posterior elevated margin is not longer than 

 in T. calligraphus, not dentate, but perfect in outline, as in T.jnni. Long. 3-5 mm. 



Southern and Western States. Varies in color like the other species. 

 I have two large specimens, more than 4 mm. long, one from Arizona 

 and one from Illinois which do not seem to differ appreciably from 

 the smaller eastern specimens of this species. 



