Mr. T. V. Wollaston on Additions to Madeiran Coleoptera. 263 



a minute Mould or Thallus (the Rhinotrichum Bloxhami of 

 Berkeley), on which I detected the M. asperatus apparently 

 feeding, amongst the rotten tinder-like wood of an old Til-tree. 

 Whether either of the Madeiran species is identical with M. 

 Jacquelin Duval's, I will not undertake to say ; but, from one 

 or two points in his diagnosis, I am inclined to believe that they 

 are both distinct from it. 



Genus MONOTOMA. 

 Herbst, Natursyst. v. (1793). 

 Monotoma quadricollis, Aube. 



M. sublinearis, picea, opaca, pilis pallidioribus brevibus vestita; 

 oculis paulo ante basin capitis sitis ; capite prothoraceque sub- 

 rugulosis sed minus distincte punctatis, hoc elongato-quadrato 

 angulis anticis paulo incrassatis sed vix spiniformibus ; elytris 

 leviter striato-punctatis et seriatim pilosis, ferrugineis, regione scu- 

 tellari obscuriore ; antennis pedibusque rufo-ferrugineis. 



Long. corp. lin. 1-1 . 



Habitat Maderam, in horto Bewickiano prope Funchal sub foliis 

 marcidis abundans. 



Monotoma quadricollis, Aube, Ann. de la Soc. Ent. de France, vi. 465. 



pi. 17. f. 7 (1837). 

 Redt., Fauna Austr. 203 (1849). 



M. rather narrow and linear, piceous, opake, and clothed 

 (though not very densely) with a short, rigid, decumbent, paler 

 pile. Head and prothorax punctured and slightly roughened, 

 the punctures, however, not being so deep or well-defined as in 

 either the M. spinifera or congener : the former rather longer, or 

 less truncated posteriorly, than in the M. congener } and with the 

 eyes a little further removed from the hinder rim (which is not 

 quite so narrow and prominent as in that insect) : the latter 

 elorigato-quadrate, being of nearly equal breadth throughout, 

 and with the sides almost straight ; with the lateral edges mi- 

 nutely crenulated; with the angles not produced, though the 

 anterior ones are somewhat thickened, or enlarged, and the 

 posterior ones minutely prominent ; and with indications of a 

 small obsolete fovea on either side of the disk behind. Elytra 

 ferruginous, but more or less obscured about the region of the 

 scutellum, faintly striate-punctate, and (as in the following spe- 

 cies) with the pubescence arranged in very distinct longitudinal 

 rows. Limbs bright rufo-ferruginous. 



Detected abundantly by Mr. Bewicke and myself, in company 

 with the M. spinifera, beneath dead leaves and vegetable refuse, 

 in his garden at the Palmeira, above Funchal, during December 

 of 1858; as also, subsequently, at the Praia Formosa. Its 



