268 0?i Aquatic Carnivorous Coleoptera or Dytiscidce. 



I. S.— Genus SUFIIIS. 



Middle of presternum not prominent in front ; epipleurse althougli abruptly 

 inflexed, not comi^letely horizontal but only obliquely so (except at the humeral 

 angle). 



The three species are found in South America and the Antilles. 



27. Suphis cimicoides, Aube, M.C. — Valde convexus, ovalis, posterius acumi- 

 natus, sine pubescentia, nitidus, ex ferrugineo-sanguineo nigroque vage variegatus, 

 antennis jDedibusque rufis ; densius fortiterque punctatus ; antennis elongatis ; 

 corpore subtus nitido, abdomine minus conspicue punctulato. Long. 4 m.m., lat. 

 21 m.m. 



South Amei-ica ; Cayenne, Antigua, (Brazil fide Aubc). The specimens from Antigiia ai-e 

 smaller, and have the antennae a little shorter than the type from Cayenne. 4G1. 



2S. Suphis subtilis, n. sp. — Valde convexus, ovalis, posterius acuminatus, sine 

 pubescentia, nitidus, rufo-ferrugineus ; supra vage irregulariterque nigro- 

 sio'natus dense sat subtiliter punctatus; antennis minus elongatis, corpore subtus 

 nitido, abdomine minus conspicue punctulato. Long. 3's, lat. 2^ m.m. 



Very closely allied to S, cimicoides, but rather smaller, with the antennae 

 shorter, and the punctuation of the thorax finer. 



South America ] Ne-\^' Granada, Cumana. 462. 



29. Suphis difformis, n. sjj. — Valde convexus, ovalis, posterius acuminatus, sine 

 pubescentia, nitidus, rufo-ferrugineus, supra irregulariter vageque fusco-signatus ; 

 elytris crebrius et evidenter, quam thorace densius punctatis ; antennis elongatis ; 

 corpore subtus nitido, abdomine inconspicue punctulato. Long. 4, lat. 2f m.m. 



This species is extremely similar to Suphis cimicoides, but has the antennte a 

 little longer, and the punctuation of the thorax is more sparing and not so coarse, 

 especially towards the front and sides. 



South America; Bahia ; Santa Rita, September 1850, Sahlberg; (Oiinoco, King, in Dejean's 

 collection). 460. 



11. 3. — Group Htdeocanthini. 



Prosternal process broad, and with broad, subtruncate hind-margin ; posterior 

 femora with a conspicuous group of cilia; at their outer angle. 



