INSECTA MADERENSIA. 155 



with the anterior angles produced, and the extreme posterior ones distinctly prominent. Elytra 

 widest behind the middle, and faintly jjunctate-striated ; the interstices each with two rows of 

 minutely impressed points. Bodij beneath, and the legs bright rufo-piceous. Antenna darker 

 (especially in the middle), and gradually incrassated towards their apex. 



The common T. mauritanica is one of those insects Avhich follow in the wake of 

 commerce, and it is consequently fonncl, at times, in nearly all countries of the 

 world. It is not only with flour and grain, but even amongst skins and fiu's, and 

 such like merchandise, that it is liable to become introduced ; and in England it 

 has been frequently received, alive, in boxes of natural curiosities from India and 

 China. In Madeu-a it is, in lilve manner, at intervals abundant, — occurring in 

 granaries and warehouses in and near Funchal ; and I have occasionally captured 

 it on board vessels which have been lying at anchor in the bay. 



§ II. Protliorax sulqmdratus, angulis ipsis posticis vLv exstantihus : anfennce breviores, ad apicem clavafce 

 {articulis nono, decimo et undeoimo clavam distinctam intiis serratam e_fficientibus). 



126. Trogosita serrata, Woll. 



T. angusto-subcylindrica picescenti-ferruginea subopaca, elytris parallelis profunda punctato-striatis. 

 Long. corp. lin. 3|. 



Habitat Maderam ; mihi non obvia, sed duo specimina benigne communicavit ReV^^^ Dom. Lowe. 



T. narrower, more cylindrical and parallel than the T. mauritanica, also less depressed, of a pale 

 piceo-ferruginous hue, and much more opake. Head and prothorax deeply punctured : the 

 latter much more quadrate than that of the last species (being narrower in front and broader 

 behind,— and consequently with the sides straighter) ; with the anterior angles rather obtuser and 

 less produced, and the extreme posterior ones not so much thickened or prominent as those of that 

 insect. Elytra narrow, parallel, and deeply punctate-striated ; the interstices each with two rows 

 of most minutely impressed points. Antenna and legs concolorous with the rest of the surface ; 

 the latter rather shorter than those of the T. mauritanica, and distinctly clavated at their apex, — 

 the terminal three joints forming a tolerably abrupt and internally-serrated club. 



In its distinctly clavated antennae and comparatively subquadrate prothorax the 

 present insect recedes from the normal members of the genus. As regards the 

 former indeed its structure is very remarkable, the ninth, tenth and eleventh 

 joints forming an abrupt and internally-serrated club : — nevertheless there can be 

 no doubt but that it is a true Trogosita, since in aU other respects it retains the 

 essential characteristics of the group. I have not, myself, succeeded in detecting 

 it in the Madeira Islands, the only two specimens which have hitherto come 

 beneath my notice having been presented to me by the Rev. R. T. Lowe from the 

 collection of the late Dr. Heineeken, by whom they were captured many years ago 

 near Funchal, — and where it is far from improbable that they may have been 

 accidentally introduced with corn or merchandise. 



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