340 On Aquatic Carnivorous Coleoptera or Dijtiscidw. 



I. 21.— Genus DESMOPACHRIA. 



Front coxse almost reaching the front border of the prosternum ; prosternal 

 process minute, rhomboidal, about as broad as long, its extremity sharply angulate • 

 intercoxal process of metasternum connected with the mesosternal fork ; hind tibiae 

 straio-ht, their basal portion not conspicuously narrower than the apical one. 



Thirteen species are included in this genus ; they are insects of peculiarly broad 

 short form, the breadth being nearly as gi-eat as the length. Nearly all the species 

 are at present rarely represented in our collections ; they are peculiar to the New 

 World. 



229. Desmopachria suturalis, n. sp. — Brevis, lata, subrotundata, sat convexa 

 ferrugiuea, crebre sat fortiter punctata, elytris stria suturall distincta ; prothorace 

 basi utrinque sinuato, angulis posterioribus acutis. Long. 2s, lat. 2 m.m. 



The head is rather narrow, the clypeus in front somewhat produced, the surface 

 finely and moderately closely punctured. The thorax is distinctly punctured, the 

 punctures along the whole breath of the basal portion being dense. The elytra are 

 distinctly and closely punctured, and along the basal portion of the suture are 

 marked by a stria formed by elongate punctures. The hind coxse, except in their 

 hinder portion, are rather coarsely punctured ; the metasternum is impunctate. 



Brazil, (Santa Rita, August 1850, Sablberg). 52. 



230. Desmopachria ovalis, n. sp. — Brevis, lata, subrotundata, convexa, 

 ferruginea, crebre sat fortiter punctata ; prothorace basi utrinque leviter sinuato. 

 Long. 21, lat. 1» m.m. 



Closely allied to D. suturalis, but only half the size, rather more convex, with 

 the front and middle tarsi much less elongate, but stouter, and with no sutural 

 stria on the elytra ; the sinuation of the base of the thorax near the hind angles is 

 less distinct. 



Brazil, (Santa Rita, August 1850, Sahlberg). 53. 



231. Desmopachria concolor, n. sp. — Brevis, lata, subrotundata, sat convexa, 

 ferruginea, crebre vix fortiter punctata, prothorace basi utrinque leviter sinuato. 

 Long. 2t, lat. \l m.m. 



Very closely alUed to Desmopachria ovalis but slightly broader and less convex, 

 less acuminate behind, and with the punctuation of the elytra rather finer, and the 

 posterior tarsi rather longer. 



South Amcrioi, (Uruguay). 56. 



