On Aquatic Carnivorous Coleoptera or Dijtiscid(s. 487 



I. 4-2.— Genus CELINA. 



Scutellum large, exposed ; front and middle tarsi five-jointed, the three basal joiata 

 broader than the two apical, the third emarginate or sublobed, the fourth smaller 

 than the others, the fifth elongate ; swimming legs slender and feeble ; body ter- 

 minating in a spine. 



This genus is represented by seven species,* all very rare in collections ; and 

 very similar to one another ; the appearance and size is that of narrow, suboblong 

 Hydropori. They are peculiar to the warm parts of the New World, one species 

 extendiniif to the United States of North America. 



G50. Celina aculeata, Aube, M.C. — Suboblonga, elongata, nitida, glabra, rufo- 

 castanea, elytris paulo obscurioribus ; antennis testaceis, clongatis, articulo sino-ulo 

 latitudine distincte longiore ; prothorace versus margines evidenter, disco subtilissime, 

 punctate ; elytris crebre et distincte fere asqualiter punctatis, serie punctorum 

 majorum fere nullo ; corpore apice longius mucronato. Long. 5, lat. 2j m.m. 



i/as, tarsis anterioribus et intermediis fortiter dilatatis ; tibiis intermediis intus 

 curvatis, medio incisura parva, parte basali tenui, apicali lata. 



8outli Americn, (Brazil). .598. 



G.jl. Celina mucronata, n. sp. — Suboblonga, sat elongata, nitida, glabra, 

 castanea, capite thorace pedibusque rufis ; antennis testaceis, mediocritcr elono-atis ; 

 prothorace margine anteriore serie punctorum, anteque basin utrinque punctato ; 

 elytris basi parce, apice crebre punctatis, serie punctorum discoidali distincta. 

 Long. 4i, lat. 2J- m.m. 



Mas, tarsis anterioribus et intermediis fortiter dilatatis ; tibiis intermediis latis, 

 simplicibus. 



This species is not quite so elongate in form as the preceding one, and is readily 

 distinguished by the different punctuation of the elytra, and the simple intermediate 

 tibite of the male. I have seen but one specimen. 



South America, (Constant ia, June, 1850, Salilberg). 597, 



6.52. Celina longicornis, n. sp. — Suboblonga, sat elongata, nitida, glabra, rufo- 

 castanea ; antennis testaceis, elongatis ; prothorace versus margines punctato ; 



*And also by the following three, unlmowTi to me: Celina gros.sula Lee. (No. 1209); North 

 America. — HyJroporomorpha parallela Bab. (No. 133G) near No. 652; Brazil. — Hydroporu.s latipes 

 Brulle (No. 1393) ; Corrientes. 



