36 [July. 



Except the single example wliicli I found in Slierwood Forest, 

 I have seen no Trichopteryx which really agrees with Gillmeister's 

 description of T. attenuata. 



Tbichoptektx seminitens, n. sp. 



L. c. Y*a I. = vix 1 mm. Oblongo-ovalis valde convexa nigra nitidissima. pilis 

 pallidis parcius induta ; capite magna, ocuUs magnis prominentibus ; pronoto sat 

 magna, pastice dilatata, ad basim latissimo lateribus leviter ratundatis, tuberculis sat 

 magnis ordinibus sinuatis sat remate dispasitis, interstitiis nitidissimis vix reticulatis 

 ornalo ; elytris brevibus capite atque pranoto multobreviaribus parum angustioribus, 

 pastice attemtatis, ardinihus sinuatis sat rematis sat prafunde asperatis, apicibus 

 latis leviter ratundatis; abdomine longius exserta apice sat obtuso ; antennis sat 

 brevibus piceis ; pedibtts robustis brevibus obscure Jlavis. 



Head large, very shining, produced triangularly in front, minutely and remotely 

 tuberculate. Eyes large and prominent. Antenna? rather short, slender, piceous. 



Thorax large, very convex and very shining, much longer and vs'ider than tlic 

 head, much dilated posteriorly, vfidest at the base, adorned vcith rather large 

 tubercles disposed in remote sinuated rows, with the interstices very shining and 

 very faintly reticulated, sides margined and slightly rounded, posterior margin de- 

 pressed, pale, and rather deeply sinuated, with the angles broad and much produced. 

 Scutellum large and broad triangular, deeply and closely asperate. Elytra short, 

 atteniiated posteriorly, much shorter and rather narrower than the head and thorax, 

 rather deeply asperated in remote sinuated rows, with the interstices shining, sides 

 almost straight, apices broad, slightly rounded, narrowly paler, with the extreme 

 edge white. 



Abdomen much exserted, rather obtuse, with the apex minutely bidcntate. 

 Legs rather shoi't, robust, dark yellow. Undcr-parts black, with the mouth and 

 coxae yellow. 



Differs from T. fascicidaris in the greater convexity of its form, 

 the shining surface and remote sculpture of the thorax and shorter 

 piceous antennae, from T. attenuata in its larger size and much greater 

 convexity, shorter antennje, and in the sculpture of the thorax. 



Ptilium marginatum, Auhc. 



I haA'G found four specimens of this species among some insects 

 which had been talc en by myself and Mr. Crotch during an excursion 

 into the fens of Cambridgeshire and Norfolk in 18G8, and subsequently 

 reserved for further examination. 



Ft. marginatum may be known from Ft. Spencei by its usually 

 larger size, the greater width and closer scnlpture of the thorax, which 

 is widest at the base, with the basal margin evidently reflexed. 



Gumley : Mag, 1877. 



