CANAKIAN COLEOPTERA. 511 



The H. picescens seems to be peculiar to Lanzarote and Fuerte- 

 ventura. but is more common in the former than the latter. It was 

 taken abundantly by Mr. Gray and myself, during Januaiy 1858, 

 around Haria and Magui, in the north of the former — where I again 

 met with it in the spring of the following year ; and it was likewise 

 found (in Lanzarote), as already stated, by M. Hartung. My Fuerte- 

 venturan examples are principally from the intermediate district 

 between La Antigua and the Agua Bueyes*. 



763. Helops fusculus, n. sp. 

 H. fusco-piceus, subopacus ; capite prothoraceque densissime punc- 

 tatis, illius oculis (longitudinaliter) angustulis, hoc convexo, ad 

 latera subsequaliter rotundato, mox ante angulos ipsos posticos 

 (argute obtusos et obsoletissime subrecurvos) vix sinuato ; elytris 

 fere simpliciter striatis (striis externis obsolete crenulatis), inter- 

 stitiis minutissime punctulatis ; antennis pedibusque longiusculis, 

 clare rufo-feiTugincis. — Long. corp. lin. 4. 



Habitat Teneriffam, a W. D. Crotch semel repertus. 



The single example from which the above diagTiosis has been drawn 

 out was taken by Dr. Crotch in Teneriffe (I believe, near Ycod el Alto), 

 during the spring of 1862. In its fusco-piceous hue, very densely 

 punctured head and prothorax, and most minutely punctulated inter- 

 stices it agrees with the H.jyicescens ; nevertheless it is very different 

 in most other respects. It is well distinguished by its subopake sur- 

 face, by its (longitudinally) narrowish eyes, by the convexity of its 

 prothorax (which is almost equally rounded at the sides, and has its 

 extreme hinder angles obtuse and with a faint tendency to be sub- 

 reflected), and by its elytra having their inner striae nearly simple — 

 even the outer ones being but faintly crenulated. 



Fam. 76. (EDEMERID^. 



Genus 287. DITYLUS. 

 Schmidt, in Linn. Ent. i. 87 (1846). 



* Prof. Heer, in the list which he prepared for M. Hartung's volume, cites two 

 species of Helops (namely, " transversalis, Br." and " qitadrahts, Br. ? ") for Lan- 

 zarote, and one {" quadrahis, Br. ?") for Fuerteventura. Being mere catalogue- 

 insertiotis, it is scarcely necessary to notice them, or to conjecture what they were 

 intended to refer to; but by '' quadratus, Br.?" he probably meant the H. 

 (ethio'ps (which, however, has nothing in common with M. Bridle's quadratus) : 

 whilst his " transvermlis, Br." may perhaps have been applied to one of the sexes 

 of the picescens. But I mvist remark that M. Brulle has no Helops called " trans^- 

 ■versalis."' He has an H. transversns ; but tliat insect comes nearer to the carhun- 

 culus than to anything else here enumerated, and is totally distinct from all the 

 three species found in Lanzarote and Fuerteventura. 



