64 JOHN L. LE CONTE, M. 1). 



attain the hind coxse; those for the hind pair extend from the base 

 of the 1st ventral segment to the hind margin of the third, and are 

 also divergent. 



P. Hornii, elongatus, nigro-piceus, subtiliter helvd-piibesceii.s.capile ronvcxo 

 [Hinctato ; thorace fortiter punetato, punctis subvariolosis, latitudine baseos bn- 

 viore. antrorsum valde angustato, lateribus obliquis reetis, angiilis postieis vrili- 

 dis planis, paulo inflexis ; elytris parallels apice obtuse rotundatis: striis pn- 

 fundis fortiter punctatis. interstitiis subtilissime punctulatis. Long, .'i-5 miii. 



California; one specimen given me h}^ Mr. H. Ulke. I have seen 

 one also in the collection rf Dr. (x. H. Horn, to whom it gives im- 

 much pleasure to dedicate this interesting addition to our founa, in 

 cbmmemoration not only of his continued labors during several year;?, 

 in our Pacific States, butf also of the many valuable observations on 

 the Coleoptera of those regions published by him since his return. 



EXOPIOIDES Guer. 

 E. incisa, rufo-picea, elytris obscure ferrugineis, supra subtilissime, .subtus 

 longius i)ubescens ; capite dense granulato, inter ooulas linea frontali transversa 

 irapresso, occipite transversira impresso, foveaqae media nitida inseulpto; tho- 

 race capite paulo angustiore, ab apice sensim angustato, latitudine apicis hand 

 longiore, valde convexo, dense subtiliter granulato et rugoso, apice vage. has; 

 fortiter licet anguste marginato, dorso canaliculaco; elytris cylindricis pasti<'o 

 declivibus, apice singulatim emarginatis et bidentatis, basi punctatis, postici' 

 sensim granulatis. Long. 13 mm. 



One specimen, California. This interesting species has the form of 

 Polj/caon, but differs from that genus by the antenna; having only 10 

 joints; and of these 10. the od and 4th are really connate, and only a 

 slightly sinuous outline is left to indicate the compound nature of the 

 joint. The labrum is larger, more prominent and more deeply emar- 

 ginate than in JR. Sfoytii and ooipi inn's, but scarcely more so than in 

 P. exesus; in P. puhcsceas the labrum is very transverse, and not 

 emarginate. The 4th and following joints of the antennse of the two 

 .species first named are much longer than the 3d, in the last two the 

 3d and the following to the 8th are equal in length. In the first two 

 the tufts of hair on the 2d and 3d tarsal joints are very short, in the 

 last two much longer, and in Exopioi.dea still longer and denser, so as 

 to closely resemble membranous lobes. 



It is proper to add to the characters given above that the front tibia- 

 of Uxopioides are shorter, and more triangular in form, and that the 

 terminal hook is stouter and more curved than in Pol^caon; the ony- 

 chium of the last tarsal joint is quite distinct. 



