no 



Australia, — the latter (from the far North of tropical Australia) 

 I have not seen. I am somewhat puzzled by a remark Mr. Lewis 

 makes — Ann. Nat. Hist. (6), IX., p. 353 — to the effect that 

 Teretrius Walker i, Lewis, was found in Tasmania in company 

 •with Teretriosoma Somerseti, Mars., and am somewhat inclined to 

 wonder whether he accidentally wrote '^Somerseti " when he in- 

 tended ^^meUmrniiis" I have examples of a Teretriosoma taken 

 by Mr. Walker in Tasmania ;ind ticketed ^^ Somerseti^" which are 

 certainly not that species (at least they do not agree with de 

 Marseul's description) for tliey have seven teeth on their front 

 tibia^, and I have myself met with the same insect in Tasmania. 

 They are very close to T. melhmmius, Mars., but a certainly dis- 

 tinct species ; I describe it below. 



I may here remark that T cannot find in the Australian 

 Teretriosomata the sexual antennal characters which Lewis 

 alludes to as present in American members of the genus ; the 

 sexes, however, are easily distinguished by the sculpture of their 

 pygidium. In one sex (which I take to be the female) the sur- 

 face of that segment is uneven (variously according to the species), 

 in the other it is without inequalities. 



I should add that I have no ground for attributing these 

 species to Teretriosoma except Lewis' use of the name for 

 T. Somerseti and de Marseul's statement that it and 

 T. melbur^iius are very closely allied ; but they are certainly 

 very distinct from Teretrius. I have not seen Horn's diagnosis 

 of Teretriosoma. 



T. gradile, sp. nov, Subcylindricum, modice latum ; glabrum ; 



nigro-piceum, latera versus vix rufescens, corpore subtus 



dilutiori, antennis (harum clava testacea) pedibusque obscure 



rufis ; capite pronotoque subtilius sat crebre (fere ut 



T. MeJburnii, Mars.) punctulatis ; elytris baud striatis, 



apicem et latera versus sat dense minus subtiliter (versus 



scutellum gradatim minus dense magis subtiliter, prope 



scutellum subtilissime sparsissime) punctulatis ; pygidio sat 



crebre sat fortiter (apicem versus nonnihil rugulose) punc- 



tulato ; prosterno sat fortiter vix crebre punctulato, haud 



striato ; tibiis anticis denticulis 7, posterioribus 6, armatis. 



Long., H 1.; lat , tV 1. 



This species is very close to T. MeJburnius, Mars., — in fact I 



do not observe any well-defined difference except in the punc- 



turation of the elytra, which however is extremely well marked. 



My unique example is of the sex which has the pygidium even ; 



I have little doubt that the inaequalities on that segment in the 



other sex are different from the corresponding inc^qualities in 



melhiirniiis. The gradual fading away of the puncturation on 



the elytra from the apex and sides towards the scutellum is very 



