( 506 ; 



Long. 25 mm., elytr. KS, lat. 13. 



Allied to P. limhntian. sp. nov. anil P. chrifmigyrea Salle ; distingnished from 

 the first by the rounded outer edges of the mandibles, tlie very broad and rounded 

 clypeus, by the elytra being devoid of a punctured vinaceous buff margin, the silvery 

 l)ygidium being punctured only at the sides, the bidentatc anterior tibiae, and by the 

 form of the mentum : the upperside has a very faint tint of gold which is entirely 

 absent from the upperside of P. limbata, the middle of the under surface is silvery 

 and shining, while in P. limbata, it is without metallic gloss and coloured like the 

 rest of the underside ; the process of the mesosternum is obviously curved, the four 

 posterior tibiae are green internally. From P. chrysargyrea Salle it differs in being 

 smaller, in having the prothorax much less convex, the mandibles, clypeus, and 

 113-gidium differently shaped, tlie head and pygidium differently sculptured, the 

 iutercoxal iirocess of the mesosternum more arched, and in the head and pronotum 

 being less broadly vinaceous buff. 



Hub. Costa Rica. 



4. Plusiotis melior s]i. nov. 



$ . P. statura sjieciei OjjtiiiKu- Bates, sed diflert : supra argeutea, splendidissiiua, 

 clypei margine, prothoracis elytrorumijue margine laterali reflexo, lutco-viuaceis, 

 pygidio Inteo-vinaceo-viridi ; infra cum pedibus luteo-viuacea, suturis tarsorumque 

 basi parnm viridescentibus. Caput sat fortiter, sed baud dense punctatum, punctis 

 in clypeo, praecipne in lateribus, densius sitis ; clypeus ajjice medio leviter cmargina- 

 tus. Pygidium lateribus levissime, sed couspicne siuuatum, margine apicali sii])ra 

 anum hand " alte elevato medio acute reflexo." 



Long. 25 mm., elytr. 17. lat. 12. 



This species differs at first sight very much from P. o/itinm Bates, as the latter 

 is of a beautiful reddish colour on the upper surface ; but in shape and structure the 

 differences between these two sjsecies are but slight, at least so far as we can tell 

 from Bates' description. 



Ilab. Costa Rica. 



5. Plusiotis crassimargo sp. nov. 



J ? . P. laetc pomacea, pedibus — praecipue tibiis — sat rosaceis, tarsis intenlum 

 violaceo-nitentibns. Capite i)rothoraceqae distincte, sed minute punctatis, clypeo ad 

 marginem rngoso-])unctato. Elytris singulis <juini|ne striatis, obsolete punctatis, 

 punctis prope snturam sat deusis, lateribus post imjjressionem lateralem in (J) fere 

 laevibns, in ( ? ) leviter seriatim punctatis ; margine externo ante medium conspicue 

 crassato. Processu mesosternali brevi. Pygidio medio sparsim, lateraliter dense 

 sat minute pnnctato. Tiltiis posticis panels jranctis spiniferis iustructis, fere 

 laevibns. 



Long. 42 mm., elytr. 22, lat 1 7. 



Closely allied to P. mniszecMMowv. axid P. laniventris Sturm., both in colnur 

 and shape ; but the new species is slenderer than the others, and the legs have an 

 obvious tint of jnnk colour. The punctuation of the upperside is less consjncuous 

 than in P. mniszecki, and also sparser on the metasternnm and j)ygidium ; the hind 

 tibiae, which are rongh from deep punctiform grooves in P. mniazechi and 

 P. lanicentris, have a smooth apjjearance, bearing only a few setiferous grooves. 



Ilab. Talpa, .Jalisco (Mexico), 8500 feet (Dr. Huller). 



One specimen is entirely pinkish buff, and has a golden gloss on the sterna. 



