CANARIAN COLEOPTERA. 507 



the //. congener, with the highly polished surface of the aterrimus : 

 but it may be known by its deep-black hue having a faint cyaneous, 

 or greenish-cyaneous, tinge ; by its prothorax being closely and coarsely 

 punctured, almost unsinuated on either side before the posterior an- 

 gles, and with the anterior ones (as in the H. congener) not porrect ; 

 and by its elytra having their striae most lightly impressed, with the 

 interstices flattened and very minutely punctulate. 



758. Helops quadratus. 



H. piceo-niger, subaenescens, nitidissimus, ubique dense punctatus, 

 punctis in capite prothoraceque majoribus ; clypeo ante oculos ro- 

 tundato (nullo modo exstante) ; prothorace subquadrato, angulis 

 anticis acute porrectis, quare ad apicem quasi profuude bisinuato, 

 ad latera minus rotundato, ante angulos posticos (vel subrectos vel 

 obtusiusculos) sat conspicue sinuate necnon utrinque pone medium 

 lateraliter compresso ; elytris leviter punctato-striatis, striis rarius 

 evanescentibus et plerumque conspicue punctatis ; antennis pedi- 

 busque pallide rufo-ferrugineis. — Long, corp. lin. 3^4^, 



Helops quadratus?, BrulU, in Webb et Berth. (Col.) 70 (1838). 



Ilahitnt in montibus Canarise Grandis, rarior. 



Although the types of M. BruUe's H. quadratus, which I examined 

 in Paris, do not perfectly agree with my examples of this species 

 (their elytral striae being finer, and less evidently punctured), never- 

 theless they appeared to me to be sufficiently near to render it pro- 

 bable that they are conspecific with them ; and such seems the more 

 likely from the fact of one of my individuals having the striae of its 

 elytra almost evanescent. In the event, however, of the two proving 

 hereafter to be distinct, I would then propose for the present one the 

 trivial name of montanus. 



In its subaeneo-piceous hue and shining, densely punctured surface, 

 the H. quadratus (as here defined) has somewhat the prima facie 

 appearance of the common European H. caraboides ; but the resem- 

 blance is merely a superficial one, for when more closely inspected 

 it will be seen to have abundant characters of its own. Thus, it is 

 more shining, and more coarsely, though rather less densely, punc- 

 tured ; its prothorax is a good deal longer and more quadrate, with 

 the anterior angles mucJi more porrect and acute, and the posterior 

 ones less obtuse, as also straighter (and more laterally-compressed) 

 at the sides, but more sinuated in front of the basal angles ; its ely- 

 tral striae are considei-ably lighter (in rare instances subobsolete), 

 though much more evidently punctured ; and its eyes are differently 

 shaped. The only locality in which I have observed it is at a high ele- 



