96 



L. o. 1 mm. — Ovale, validissime convexum, nitidissimum, castaneum, 



elytr tibas, pronoto minute pnnctato, et foveis duabus 



ililms impn ii, ;;iii. lonu'is. iitijue ped. laete flavis. . . speculifer. 



L. c. 0-87 mm. — Breve, valdi rum, modice punctatum, 



pronoti foveis basalibus nullis ; ped. brevibus, hete tlavis ; ant. 

 obscure flavis .......... orientale. 



L. c. 0-75 mm. — Elougato-ovatum, convexum, nigrum, leviter alutaccum, 

 pronoti foveis basalibus quatuor profundis; ped. lonj i 

 tlavis: ant. longis, gracillimis, obscure flavis .... Reitteri. 



L. c. 0-60 mm. — Ovatum, postice attenuatum, nigrum, nitidissimum, 

 glabrum, capite atque pronoto maguis, elytris parvis, ant. longis, 

 robustis, atque ped. betissime flavis concinnum. 



Ptenidium strangulatum. 



P. strangulatum, Matthews, Trans. Am. Ent. Soc. xi. p. 148, 1886 ; Biol. Cent.- 

 Amer. Col. ii. pt. i. p. 149, 1888. 



L. c. ,';,- , 7 ,, lin. = 0"75-0'87 mm. — Elongatum, ad humeros strangulatum, 

 valde convexum, glabrum, nitidissimum, nigrum ; capite magno, antice prominenti, 

 punctis minutis, remote notato; oculis magnis, prominentibus ; pronoto sat parvo, 

 transverso, ad basim fortissime contracto, capite parum latiori, baud longiori, ante 

 medium latissimo, glabro, nitidissimo, foveis quatuor valde iudistinctis, equidis- 

 tantibus, ad basim, atque duabus vel tribus, pariter indistinctis, ad angulum 

 utrumque basalem impresso, lateribus late marginatis, et valde rotundatis, margine 

 basali perbrevi, depressa et fere recta ; elytris ovatis, capite atque pronoto multum 

 latioribus, et fere duplo longioribus, prope media latissimis, glaberrimis, nitidissi- 

 mis, humeris atque apicibus runs, atque pariter et fortissime contractis, punctorum 

 remotorum, stria abbreviate, linea convergent! finita, ad Buturam utrinque impressis, 

 lateribus marginatis, et valde rotundatis, epipleuris pra modo latis, apice augusto, 

 rotundato; pedibus sat longis, late flavis; antennis modicis, flavis, clavis obscuri- 

 oribus. 



Body elongate, strangulated at the shoulders, very convex, smooth and very shining, 

 black, with the shoulders and apex of the elytra red. 



Head large and prominent, remotely and minutely punctured ; eyes large and 

 prominent ; antenna; moderate, yellow, with the club dusky. 



Thorax rather small, transverse, very strongly contracted towards the base, rather 

 broader but not longer than the head, widest before the middle, smooth and 

 very shining, with four indistinct, equidistant basal fovea', and two or three 

 indistinct foveae near eacb posterior angle, sides much rounded and broadly 

 margined, basal margin very short, depressed, and nearly straight. 



Scutellum very long, triangular, sparingly punctured. 



Elytra ovate, much broader and nearly twice longer than the head and thorax, 

 widest near the middle, very smooth and shining, shoulders and apex red and 

 equally contracted, with a row of remote punctures on each side of the posterior 

 part of the suture terminating in a convergent impressed line, sides margined 

 and much rounded, epipleura unusually broad, apex narrow and rounded. 



/'. ;(* rather long, bright yellow, tarsi very small. 



Under parts black, with the coxa', apical segment of the venter entirely, and the 

 posterior margin of the otber segments flavescent. 



Differs from all other species in the strangulated form of its body. 



Ilaliitat, Central America. Found in Guatemala by Mr. Champion. 



I have carefully examined the anatomy of this remarkable species, and cannot 

 find that it differs in any generic character from Ptenidium. 



