24 [February, 



which ought, in my opinion, be placed among the Cyclocephalides, along side 

 of Pachylus, which is also a very anomalous genus. 



P. brevipes, nigro-piceus, vel obscure castaneus, oblongus, convexus, 

 capite rugose punctato, clypeo ad apicem bidentato, fronte utrinque transversim 

 carinata, margine reflexo, thorace lateribus rotundatis, confertim punctato, parce 

 autem in disco pone medium, elytris punctato-striatis, punctis versus suturam 

 confusis, podice punctato ; abdomine coxisque posticis confertim aciculatis. 

 Long. -63 -7. 



Pennsylvania, New York and Missouri ; rare. Larger, more convex and more 

 regularly oblong than Ligyrus variolosus. The outer stria of punctures are 

 almost entirely regular, while those next the suture are confused, especially to- 

 wards the base. The eyes of the male are larger and more prominent than those 

 of the female. 



Pleocoma Lee. 



Clypeus (labrum?) prolongatus, antice angustatus acute rotundatus, pone 

 apicem cornu transverso erecto furcato armatus ; caput ante oculos acute extror- 

 sum angulatum, vertice inter oculos cornu brevi erecto armatum ; oculi magni 

 vix emarginati. Antennae 11-articulatas, articulo 2ndo sequentibus crassiore ; 

 3io paulo elougato, 4 et 5to sequalibus, 6to paulo dilatato ; 7mo adbuc duplo 

 latiore, 8 11 lamellatis, valde elongatis a^qualibus. Mandibula?, maxillteque 

 baud visffi, palpi tenues. Thorax latus antrorsum angustatus parum convexus, 

 disco antice declivi subdeplanato. Elytra parum convexa postice late rotundata. 

 Prosternum baud prominulum. Tibiae anticse elongate 7-dentatffi, dentibus 

 supernis tribus minutis, 4 mediocri, 5 7magnis; posteriores elongata3 parum 

 incrassataj, extrorsum ultra medium emarginatas et ad medium unidentata;, ad 

 apicem oblique truncatae, ciliata;, angulo externo parum producto ; tarsi (inter- 

 medii) tenues, tibia longiores, articulis 1 4 aequalibus, 5to praecedente duplo 

 longiore, unguibus simplicibus, paranychia angusta bisetosa. Corpus subtus. 

 OS pedes elytraque ad marginem longe fulvo-pilosa. 



A very remarkable insect, apparently belonging to the Dynastidae, but differing 

 from all the described genera of that tribe by the 11-jointed antenna? having a 

 four-jointed club; the 7th joint might almost be considered as belonging to the 

 club, but is only half the length of the four following. The very long hairs 

 fringing the body give a strong resemblance in appearance to Syrichthus. The 

 anterior tibiae are somewhat as in Athyreus ferrugineus and other Geotrupides, 

 but the teeth are more unequal ; the anteocular lateral horns are seen also in 

 that species; the eyes are very large, and contract the mouth so much beneath 

 that the maxillae and mandibles are invisible, or have been destroyed by insects ; 

 the thick hair also prevents me from seeing the form of the mentum. The form 

 of the prosternum is the same as in Athyreus ; the anterior femora are very 

 densely clothed with hair on the anterior surface. The anterior and posterior 

 tarsi and abdomen are unfortunately destroyed ; the middle tarsi are exactly as 

 in Athyreus. Doubt must therefore be entertained whether this genus should 

 be placed with the Dynastidae or Geotrupid* ; the form of the antennae is equally 

 repugnant to each, while the irregular puncturing of the elytra finds no parallel 

 in the latter tr.be. 



I find it impossible to determine whether the projecting part of the head 

 beyond the anterior horn is a clypeus or labrum ; there is a slight appearance of 

 a suture, but I am not certain of its existence ; the part in question is longer 

 than wide, gradually narrowed in front and acutely narrowed at tip. 



P. fimbriata, latiuscula, ovalis parum convexa, nigra nitida supra glabra, 

 capite inter cornua excavato laevi, occipite subtiliter rugose punctato, thorace 

 latitudine fere triplo breviore antrorsum valde angustato, lateribus rotundatis 

 parce punctulato, antice modice declivi, elytris stria suturali, alterisque 8 per 

 paria approximatis parum distinctis punctatis, interstitiis sat dense punctatis, 

 margine et subtus dense et longe fulvo-villosa. Long. 1-05. 



A specimen found in California by Dr. A. H. Heermann was given by him to 



