On Aquatic Carnivorous Colcoptera or Dytiscidce. 



263 



transversim sat convexus, nitidus, rufo-testaceus, tliorace anterius et posterius vao-e 

 infuscato ; elytris nigro-fuscis, vage rufo-signatis, seriebus punctorum abbreviatis ; 

 corpore subtus nitido, processubus coxalibus sparsim punctatis ; anteunis brevibus, 

 articulis baud transversis. Long. 3, lat. ij m.m. 



The yellow marks of the elytra consist of the outer margin, an abbreviate vitta 

 near the suture, an indistinct small mark between it and the shoulder, and another 

 indistinct subapical one. The series of punctures are numerous and distinct, 

 moderately regular, but becoming obsolete before the base and apex. I have seen 

 but a single individual. 



Northern India, (coll. Bouvouloir). 4G7. 



11. 1. Group NOTERINI. 



The posterior femur destitute of group of cilite at the extremity of the hind 

 margin ; anterior tibia with a curved apical spur ; prosternal process rounded behind 

 (or obtusely acuminate, not truncate). This group comprises only three genera. 



Anterior tibia short, broad, and " 

 siibtriangular, with well-marked 



below.) 



outer apical angle ; the curved 

 spur short and inconspicuous. 

 A single South American species. 



f PRONOTERUS, {vide 



Anterior tibia, with indefinite 

 outer angle, and bearing a very - 

 distinct curved spur. 



The spur moderately large, hind 1 



tibife, but little flattened and ( YOTFPf^^ I 'rl ''fi'i ^ 

 dilated. European aud Mediter- | ' ^ \- " ■) 



ranean species. J 



The spur very conspicuous ; hind ' 

 tibise markedly flattened and 

 dilated. Madagascar and African 

 species. 



SYXCnORTUS, {vide p. 

 *" 2G4.) 



I. i.— Genus PRONOTERUS. 



Anterior tibia with acute outer apical angle ; the curved spur small. 

 The single species is South American. 



13. Pronoterus punctipennis, n. sp. — Oblongo-ovalis, transversim convexus, 

 nitidus, testaceus; elytris castaneis, serie abbreviata subregulari punctorum 

 majorum, et versus apicem crebrius, sat fortiter, irregulariter punctatis ; corpore 

 subtus impunctato, nitido ; antennis brevibus. Long. 2?, lat. If m.m. 



I have seen only three individuals; they are males and have the basal joint of 

 the front tarsi much thicker than those following it. 



Brazil, (Santa Rita, August and September, 18.50, Dr. Sahlberg). H 



