CANARIAN COLEOPTERA. 81 



the latter of which it was also met with by Dr. Crotch (near Eealejo). 

 The same state which is typical at Madeira, hxit which is usually 

 aberrant in more northern latitudes, namely that in which the pro- 

 thorax is immaculate, obtains equally at the Canaries ; for out of 

 17 examples which I have just examined, /o»r only have any indi- 

 cations of the two darker patches on the disc. 



128. Agabus biguttatus. 



A. ovalis, convexus, niger, subtilissime alutaceus ; capite postice ob- 

 scure bimaculato ; prothorace brevi, ad latera oblique subrecto, in 

 disco canalicula valde abbreviata fovca^formi notato, postice sub- 

 sinuato ; elytrorum utroqiie macula indistincta paiilo ultra medium 

 ad latera ornato [altera ad apicem obsoleta] necnon seriebus punc- 

 torum tribus impresso ; palpis pedibusque piceis, illis ad apicem, 

 antennis, tarsis genibusque Ifete ferrugineis. 



Mas nitidissimus, tarsis anterioribus ad basin leviter dilatatis. 



Fcem. nitidus. — Long. corp. lin. 3|-4. 



Dytiscus biguttatus, Oliv., But. iii. 40. 20. pi. 4. f. 36 (1795). 



Agabus biguttatus, Anho, Hydrocanth. 341 (1838). 



Colymbetes biguttatus?, Brulle, in Webb et Berth. (Col.) 58 (1838). 



Hahitat Canariam Grandem, in regione El Monte captus. 



Judging from Dr. Aube's excellent description, I have but little 

 doubt that this Agabus is the higuttatus of Olivier (from Italy, Sicily, 

 Spain, the south of France, &c.), — its dark, convex, oval and shining 

 body, no less than its almost unalutaceous surface, and the ferrugi- 

 nous hue of its Tcnees and feet, being points to which he particularly 

 calls attention ; whilst the fact that the higtdtatus is recorded by M. 

 Brulle, in his short list of Canai'ian Coleoptera, would render this 

 supposition the more probable. At the same time I must admit that 

 it is far more lilcehj that the following species (which abounds in 

 Teneriffe) was the one included in MM. Webb and Berthelot's very 

 meagre collection ; in which case the " Colymbetes biguttatus " of 

 BruUe's catalogue would refer to that insect rather than to the pre- 

 sent one. Be this however as it may, I believe that the Agalms now 

 under consideration is strictly identical with the biguttatus of Aubd's 

 Monograph. It appears to be rare at the Canaries, the only three 

 specimens which I have seen having been captured by myself in the 

 region of El Monte in Grand Canary during the spring of 1858. 



129. Agabus consanguineus, n. sp. 



A. pra^cedenti affinis, sed paulo oblongior (i. e. ad latera vix minus 

 rotundatus), minus convexus, minus nitidus (in sexu foemineo etiam 

 subopacus), prothoracis angailis postieis vix magis rectis, scutello 

 vix niinore et magis triangulari (ad apicem subacutiore), antennis 



