new Species of Histeridse. 183 



Tryponceus singularis, sp. n. 



Oblongus, rufo-piceus, nitidus ; ( c? ) rostro apice reflexo in medio 

 leviter carinato ; thorace antice utrinque explanato ; elytris 

 macula media rufa, sparse punctulatis ; prosterno piano, ( $ ) bi- 

 striato. 



L. 4|-4f mill. 



Oblong, pitchy red, shining, with anterior angles of the 

 thorax, band before the base of the elytra, legs, and antennae 

 reddish brown ; the male, snout reddish, obtuse, and dis- 

 tinctly reflexed, with a short median carina, lateral margins 

 elevated, punctuation between the eyes very sparse; the 

 thorax sparsely and irregularly punctulate, anterior angles 

 arched and explanate outside the antennal fossettes, with a 

 faint median impression behind the neck which reaches to the 

 middle ; the elytra punctulate like the thorax, with a rather 

 broad yellowish-red band behind the base, band obscurely 

 marked at the suture and on the outer margin, the apices 

 of the elytra are also narrowly reddish ; the propygidium and 

 pygidium are rather closely and evenly punctured, the latter 

 obtuse and hairy at the apex ; the presternum, keel flat, 

 somewhat wide, and without stria} ,• the mesosternum obtusely 

 acuminate anteriorly, with a complete marginal stria. The 

 female : snout sparsely and faintly punctulate, apex emarginate 

 and faintly impressed in the middle ; the thorax much more 

 distinctly punctulate than in the male, with the thorax scarcely 

 explanate at the angles, and the apex of the pygidium very 

 obtuse and feebly emarginate at the tip ; the presternum 

 bistriate. 



I believe the specimens described above are sexes of one 

 species, which is a very remarkable one owing to the form of 

 the thorax ; and I do not know of any other species in which 

 the presternum is only striate in one sex. 



Hab. Rio Janeiro {Fry, no. 4482). Two specimens in 

 Mr. Fry's collection. 



Chlamydopsis striatella, West wood. 



Byzenia formicicola, King, Trans. Ent. Soc. N. S. Wales, ii. pt. 1, p. 74, 

 = Chlamydopsis striatella, Westw. Trans. Ent. Soc. Lond. p. 317 

 (1869) ; Thesaurus Oxon. 1874, p. 68, pi. iii. fig. 8. 



Both these names were published in 1869, but Westwood's 

 paper was published in August, while King only read his 

 paper in November. King erroneously assigned the species 

 to the Byrrhidae. 



