100 Mr. D. harp's revision of the species 



crenate-punctate or smooth. I have not found amongst 

 the individuals in my collection any with the claws 

 toothed, and am not aware that any external mark by 

 which the sexes may be distinguished exists. 



7. Tropisternus breviceps, n. s. 



Crassus, latus, sat convexus, niger, nitidus, parum 

 metallescens, palpis concoloribus, crebre subtiliter punc- 

 tulatus ; mento fortiter punctato ; elytrorum linea mar- 

 ginali laevigata. Long. 11 mm., lat. 6|- mm. 



Brazil (from Eeiche's collection under the name of 

 T. crassus). 



I have before me only a single individual of this 

 peculiar species, remarkable for its short broad form. 

 The palpi are remarkably short, and are dark in colour. 

 The mentum is shining, but is deeply and rather coarsely 

 punctate. The posterior punctures of the clypeal series 

 are reduced to two or three on each side ; the punctures 

 near the inner margin of the eye are numerous, but are 

 irregularly placed. The hind tibiae have a series of 

 punctures bordering their smooth internal face ; each of 

 these punctures bears a short fine spine, the series does 

 not extend to the apex, and the terminal punctures are 

 not different from the others. The sternal spine is 

 short and broad, and its apex is carinate in the middle. 

 The last ventral segment is not carinate, but bears at 

 the extremity a minute and short, rather thick, pencil of 

 setae. The pubescent area of the posterior femur is 

 confined to a small space extending along the anterior 

 margin. 



8. Tropisternus brevicollis, Sharp. 



Sharp, Biol. Cent. Am., i., pt. 2. p. 56, pi. ii., f. 4. 



Mexico. 



Allied to T. breviceps, but of much narrower form, 

 with the surface less punctate, and the clypeal and 

 orbital punctures still more reduced ; the mentum is less 

 punctate ; the sternal spine not so short and broad, not 

 carinate ; the last ventral segment plicate along the 

 middle, the fold, however, but little elevated. The unique 

 individual in my possession was compared with Dejean's 

 collection of HydropJiilus by Mulsant at the time this 

 passed into the possession of the Lyons Museum, and 

 was marked as a species " not in Dejean's collection." 



