LeConte.J 



TOMICINI. 355 



17. P. digestus. C'rpphalus dig. Lee, Trans. Am. Ent. Soc. 1874, 171. 

 Mojave Desert, Calitornia; Mr. Crotch. Eleven specimens without sexual 



differences, all having the head punctured and finelj- carinate. The elytra 

 are confusedly punctured, but the punctures have a tendency to form rows; 

 they are not retuse behind, but the sutural stria is deeply impressed. Length 

 1.7 mm.; .07 inch. 



18. P. comatus. CryptuvgusXeom. Zimm., Trans. Am. Ent. Soc. 1868, 

 143. 



South Carolina; Dr. Ziramermann. The specimen is a (J', and has the 

 head nearly smooth, broadly and deeply concave, thinly fringed with not 

 very long yellow hair. The species is easily recognized by the large ellip- 

 tical patch of yellow hair each side of the prothorax, and by the fine dis- 

 tant rows of elytral punctures; the declivity is not retuse, and the sutural 

 stria is deeply impressed. The club of the antennne is divided by three dis- 

 tinct straight sutures. I am not certain of the number of divisions in the 

 outer part of the funicle. Length 1.8 mm. ; .07 inch. 



It is possible that P. infans Eichhoff, Berl. Ent. Zeitsch, 1871, 135, may 

 be the 9 of this species. It is, however, unknown to me. and I have seen 

 nothing that corresponds with the description. 



HYPOTHENEMUS West wood. 



The species I refer to this genus agree in having the outer part of the 

 funicle of the antennae very short, shorter in fact than the first joint, and 

 very indistinctly divided; in the first species only by one transverse suture; 

 but in H. dissimilts, the divisions seem more numerous, probably three, 

 but so indistinct that they are without value. The head is larger and 

 more exscrted than in the preceding genera; eyes narrowly emarginate; 

 the club of the antennas is round, compressed, moderate in size, and di- 

 vided by straight sutures on both sides. The tarsi are distinctly 5-jointed, 

 the third joint rather longer than the first or second; the fourth small as 

 usual; fifth elongate. The tibise are distinctly serrate towards the tip. The 

 declivity of the elytra is not retuse or sulcate. 



A. Body cjiindrical, asperities of prothorax acute and numerous. 

 Brown, hairs stout, clavate, erect, finely striate like the 



spines of some Echini 1. hispidulus. 



B. Body stouter, prothorax more rounded, with fewer and larger asperities. 



Hairs erect stout, clavate 2. erectus. 



Hairs slender, longer 3. dissimilis. 



C. Body elongate; prothorax with scarcely any asperities. 



Elytra very strongly punctate-striate 4. striatus. 



1. H. hispidulus. Cryphalus Imp. Lee, Trans. Am. Ent. Soc. 1868, 

 156. 



Middle and Southern States. Exactly resembles in appearance H. erudi- 

 tus w.w. (specimens of which I owe to the kindness of Professor West- 

 wood), but is rather larger, and the head and prothorax are dark piceous. 



