T6 DESCRIPTIONS OF NEW SPECIES. 



OC1IODAECS LEP. 



282. O. frontalis. Ovalis convexus, ferrugineus, breviter fulvo- 

 setosus, punctatus, clypeo antice transversim sulcato, capite inter an- 

 tennas tuberculo parvo armato, inter oculos transversim paulo elevato, 

 thorace scabro-punctato, postice canaliculate elytris etriato-punctatis, 

 interstitiis modice punctatis, baud elevatis. Long. -30. 



Texas ; Mr. Ulke. Yery distinct from our other species by 

 the subacute frontal tubercle. The form of body is as in 0. 

 simplex. The mandibles appear to be destitute of teeth. 



DIPLOTAXIS KIEBT. 



283. D. pllbemlus. Elongato-oblongus, castaneus, pube erecta helva 

 vestitus, capite tboraceque confertim punctatis, clypeo marginato, antice 

 subtruncato, tborace latitudine plus duplo breviore, antice vix angus- 

 tato, lateribus rotundatis angulis omnibus obtusis, elytris fortius puncta- 

 tis, costis solitis vix distinctis, tibiis auticis obtuse tridentatis. Long. -32. 



Texas ; Mr. Ulke. The claws are cleft as usual. This species 

 must be placed next to D. sordida, though differing greatly in 

 the form of the thorax. 



DASYDERA LKC. 



284. D. rathvoni. Nigra, pilis longis erectis vestita, thorace dense 

 punctato, longe fulvo-piloso, elytris dense punctatis, breviter nigro- 

 pubescentibus, apice attenuatis divergentibus, guttis parvis flavo-pubes- 

 centibus serie quadruplici positis, antennarurn clava obscure testacea. 

 Long. -40 -60. 



Sacramento Yalley, California ; Mr. S. S. Rathvon. The 

 elytra are only two-thirds the length of the abdomen, gradually 

 but considerably attenuated towards the extremity. The antennal 

 club in the male is twice as long as in the female, though smaller 

 than in D. ursina. The lateral tooth of the anterior tibia? is 

 strongly marked, while in D. ursina it is indistinct. 



LACHNOSTERNA HOPE. 



285. I maculicollis. Dilute fusco-ferruginea nitida, elongata, 

 thorace parce punctato, apice marginato, flavo, macula maxima antica 

 nigro, capite confertim punctato, nigro, clypeo parabolico, fortiter mar- 

 ginato. Long. -48 -55. 



Two males, Cape San Lucas ; Mr. John Xantus. Resembles 

 in appearance some species of Cyclocephala. 



