NATURAL SCIENCES OF PHILADELPHIA. 345 



35. Dorcus m a z a m a dj 1 ) nigro-piceu3, capite punctato, thorace vix 

 angustiore, mandibulis apice acutis, dente parvo medio armatis, thorace lati- 

 tudine plus duplo breviore, postice angustiore, lateribus medio obtuse angulatis, 

 angulis posticis rectis, disco modice, versus latera sat dense punctato, elytris 

 modice punctatis subtiliter rugosis, tibiis anticis 4-dentatis, et dente superiore 

 obsoleto munitis, tibiis posterioribus dentibus 3 lateralibus apicalique acutis 

 armatis. Long. (mand. excl.) 1'20 



New Mexico, Mr. Ulke, one male. This species is alluded to by me on page 

 120 of my Classification of the Coleoptera of North America, as belonging to 

 Lucanus, but the form of the labrum, which is rectangular and about four 

 times as broad as its length, requires it to be placed in Dorcus. The outline 

 of the thorax differs very greatly from that of our other species, in which the 

 sides are simply and broadly rounded: in the present species the form is as 

 in Lucanus d a m a, but a little more dilated on the sides. The third tooth 

 of the middle and hind tibiae is double, that is, there are two sharp teeth 

 placed transversely, so as to present the appearance of a single tooth. 



36. Platycerus coerulescens (^), niger, capite thoraceque parce grosse 

 punctatis, hoc transverso, lateribus antice rectis paulo convergentibus, pone 

 medium iuflexis, angulis posticis obtusis baud rotundatis, elytris nigro-cyaneis, 

 punctis striatim digestis, interstitiis irregulariter subseriatim punctatis ; man- 

 dibulis sursum incurvis, dente inferno pone apicem, alteroqne superno arma- 

 tis. Long. (mand. inclus.) -48. 



Tejon and Vallecitas, California. Closely related to P. q u e r c u s, but the 

 punctures of the head and thorax are much more distant, the lateral margin 

 of the thorax is narrower, the elytra are not at all rugous, and there are no 

 denticles between the apex of the mandibles and the tooth on the inferior 

 margin : the 6th joint of the antenna? is transverse as in P. qu ere us, and 

 the club consists of four joints. 



37. Platycerus Agassi i, (9) elongato-ovalis, supra obscure seneus, ca- 

 pite thoraceque sat dense punctatis, hoc linea dorsali lsevi, latitudine duplo 

 breviore, lateribus fortiter marginatis valde rotundatis, angulis posticis rectis 

 prominulis, elytris obsolete striatis, striis punctatis, interstitiis rugosis confuse 

 punctatis ; tibiis posticis denticulo externo ad medium armatis. Long. "38. 



One specimen, San Mateo, California, Mr. A. Agassiz. Closely related to P. 

 depr es s us Zee. (with which P. oregonensis Westwood is probably 

 identical), but differs by the thorax being wider, with a distinct dorsal smooth 

 line, by the interstitial punctures of the elytra being smaller, but especially 

 by the hind tibiae having a small sharp tooth about the middle on the outer 

 edge. The seventh joint of the antennae is not transverse, and the mandibles 

 are small and acute, without teeth. 



Dasydera Lee* (n. g. Scarabaeidae Glaphyrini.) 



Antennae 10-articulatae, clava maris scapo haud breviore triarticulata, 

 articulis haud approximatis ; palpi maxillares articulo ultimo ovali, majusculo, 

 extus profunde excavato ; mandibulae parvse obtusae ; labrum late emargin- 

 atum. Unguiculi basi latiores, haud dente armati. 



The species of this genus resembles precisely in form Lichnanthe v u 1 p i n a, 

 but is still more hairy : the characters are entirely as in Lichnanthe, except 

 that the club of the antenna? is larger, the labrum is less deeply emarginate, 

 the maxillary palpi are thicker, and the last joint is oval instead of elongate, 

 and the claws are not toothed at the base. 



38. D. u r s in a, nigra, pilis longissimis pallidis sericeis dense tecta, capite 

 thoraceque confertissime subtilius punctatis, elytris pallide testaceis, subgla- 



1861.] 



* Class. Col. N. America, p. 133. 



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