1873.] 179 



Ptilium cj:sum, Ericlis. 



In 1870, Mr. Gr. E. Crotch took six specimens of a PtiUum in 

 the Cambridgeshire fens, and which he kindly sent to me shortly after 

 their capture ; as he and I had previously taken P. affine in the same 

 neighboui'hood, and as at that time I had more work than I could 

 well get through, I placed these insects among our reserves. In the 

 spring of the present year, while examining these hoards, I came 

 across the specimens in question, and was much pleased to discover 

 that they all belonged to the Pt. ccBsum of Erichson. 



Teichoptertx carboxakia, n. s. 



L. c. -ra lin. Ohlonga, convexa, saturata, nigra, pills hrevihis 

 flavis sat dense vesfita, capite permag)io, ocidis modicis ; pronoto capite 

 latiori, vix longiori, p)07ie medium latissimo, laterihus valde rotundatis 

 et ad hasim contractis, tuberculis oninutis, ordinihus sinuatis dispositis, 

 interstitiisque reficulatis confertim ornato, marcjine hasali valde de- 

 pressa et fortiter sinuata, angulis valde prodactis, acutis ; elytris 

 irevibus, quadratis, capite atque pronoto hand longiorihus aut latioribus, 

 ad media latissimis, laterihus leviter rotundatis, apicihus latis, fere 

 rectis, confertissime distincte et profmide asperatis ; ahdomine sat longe 

 exserto ; pedihus atque antennis rohustis, sat ohscure flavis. 



Mead very large and broacT, covered with minute tubercles in straight rows, with the 

 mterstices finely reticulated ; eyes large, not prominent ; antenna moderate, 

 slender, obscure yellow. 



Thorax moderate, wider but scarcely longer than the head, widest behind the middle, 

 with its sides much rounded and slightly margined, contracted towards the base, 

 covered with minute, but distinct, tubercles arranged in wavy rows, with the 

 interstices reticulate and shining, the basal margin much depressed and rather 

 strongly smuated, the posterior angles much produced and acute. 



Scutellum rather large, triangular, closely and deeply asperate. 



Elytra short, quadrate, narrower but not longer than the head and thorax, widest 

 near the middle, with the sides slightly rounded, deeply and very closely aspe- 

 rate, with their apex paler, very broad and straight, the extreme edge white. 



Abdomen considerably exserted, rather obtuse, with its apex obsoletely tridentate. 



Legs robust, dark yellow, with the femora obscui'C. 



Under-parts black, with the mouth and coxfB piceous. 



This insect is allied to T. p)icicornis, Mann., but differs from that 

 species in its paler and more slender autenna>, of which the Sth joint 

 is linear, and not incrassate, and also in the totally different sculpture 

 of its thorax and elytra. The only example which I have seen, I found 



