82 DESCRIPTIONS OF N'EW SPECIES. 



mencing before the middle and ending about the middle ; the 3d 

 is about one-fifth from the tip, and the 4th very near the tip. 



AC9IAEODERA Esch. 



301. A. sublialteata. Subcuneiforrnis, nigro-senea fere opaca bre- 

 viter pubescens, thorace convexo brevi, lateribus rotundatis, antiorsuru 

 valde angustato, ante basin paulo latiore, dense punctato, foveis tribus 

 parvis basalibus notato ; elytris atris, fasciis duabus ad suturam inter- 

 ruptis, maculis duabas posticis liavis, striis cribratis, interstitiis angustis 

 uniseriatim punctatis. Long. -25. 



One specimen, Cape San Lucas ; Mr. Xantus. A very pretty 

 and distinct species, proportioned nearly like A. pulchella, but 

 belonging to a different group. The elytra are black, not shining, 

 with the following markings bright yellow : an angulated trans- 

 verse band extending from the margin to the 2d stria, about one- 

 fifth from the base ; an oblique band commencing on the margin 

 a little behind the middle, and ceasing at the 3d stria ; a large 

 spot about one-fourth from the tip, and a small spot very near 

 the tip. 



The last ventral segment has the usual marginal groove and 

 small transverse subapical crest. 



RHAEBOSCEEIS Chevr. 



30*2. R. tenuis. Valde elongata, nigro-senea, griseo-tincta, capite con- 

 vexo, haud dense punctato, profunde canaliculato, thorace latitudine 

 paulo breviore, antice sublatiore et lateribus ibi rotundatis, haud dense 

 rugose punctato, versus latera oblique excavato, angulis posticis rectis 

 planis, elytris rugose punctatis, apice singulatim rotundatis haud serru- 

 latis : unguiculis appendiculatis. Long. '20. 



Maryland, Mr. Ulke ; Illinois, Mr. Benj. D. Walsh. Resem- 

 bles closely in appearance Agrilus egenus, or any other of our 

 smaller species, but is known at once by the antenna? being 

 scarcely longer than the head, and received in well defined but 

 short grooves excavated in the inflexed portions of the prothorax, 

 just beneath the lateral margin. 



DRAPETES Redt. 



303. D. rilbricollis. Oblongus nitidus, vix parce pubescens, niger, 

 capite punctato, prothorace toto rufo, supra parce fortiter punctato, mar- 

 gine lateral! simplici, prosterno bisulcato, et utrinque subtiliter bicari- 



