14 Mr. C. C. Babington's Descriptions 



other oblong, and near the apex,) between the fifth and the lateral 

 margin, black ; the space next to the suture and the second and 

 fourth interstices the most regular, and of a brighter colour. Body 

 beneath and legs yellow. 



Hab. Tierra del Fuego. 



jB. Thoracis elytrorumque lateribus continuis, elytrorum apice 

 non truncato. 



3. (19.) H. ohscurus, Bab. 

 Oblongo-ovatus, opacus, minutissime punctatus, supra et subtus 



fuscus, thorace, antennis pedibusque flavis. (L. c. | ; lat. 

 I lin.) 



Minute, oblong-ovate, opaque, fuscous both above and below. 

 Head large. Antennae yellow. Thorax yellow, transverse, short, 

 broadly emarginate in front, sides rounded, posterior margins 

 wavy, the disk slightly elevated transversely, and a deep abbre- 

 viated impressed line on each side behind. Elytra ovate, fuscous, 

 the base and suture darkest, the margins and apex reddish, very 

 minutely punctured, and slightly downy, an impressed line on 

 each side at the base in continuity with that on the thorax. Body 

 beneath slightly downy, fuscous, with the abdomen rather paler. 

 Legs yellow. 



Hab. Rio de Janeiro. 



4. (20.) H. nitidus, Bab. 

 Oblongo-ovatus, nitidus, grosse punctatus, supra et subtus 



fuscus; capite, thorace (medio excepto), antennis, pedibusque 



flavis. (L. c. I ; lat. ^ lin.) 

 Minute, oblong-ovate, shining, coarsely punctured, fuscous both 

 above and below. Head and thorax similar to the last, yellow, 

 the latter with a fuscous spot in the centre, and the lateral im- 

 pressed lines sinuated, and nearly reaching to the anterior margin. 

 Elytra ovate, fuscous, coarsely punctured, with a paler patch upon 

 each, caused by their transparency, and an impressed line upon 

 each side at the base in continuity with that on the thorax. Body 

 beneath fuscous. Legs and antennae yellow. 

 Hab. Rio de Janeiro. 



Hydroporomorpha, Bab,* 

 Corpus elongatum, depressum. Caput oculis non prominulis, 

 fronte laevi. Antenncs 1 1-articulatae, infra oculos insertae, 

 articulo prime elongato, 2do quam tertium paulo longiore, 



* Derivatio nominis, Hydroporns and /xo^^ri, forma. 



