82 CANARIAN COLEOPTERA. 



pedibusque paulo obsciirioribus, genibus fere concoloribus, tarsis 

 anterioribus masculis ad basin paulo magis dilatatis nccnon tibiis 

 anticis paulo angustioribus. 

 Var. (i [an species ?]. PaiUo minor, vix picescentior ovatior depres- 

 sior, in sexu fcemineo subopacior ; antennis pedibusque plerumque 

 rufescentioribus, — Long. corp. lin. 3|-vix 4. 



Habitat in aquis TeneriiFa? et Palmse, sat vulgaris. 



Had it not been that Dr. Aube regards the A. dUatatus (described 

 in his Monograph) as a probable variety of the common European 

 guttatus, I should have been inclined to refer the present Agabus to 

 that species. But being satisfied that it cannot be considered as any 

 form, or state, of the guttatus, I am induced to lay greater stress than 

 I should otherwise have done on the few points of dissimilarity which ' 

 would appear to separate it from the one indicated in his diagnosis. 

 Thus, there is no appearance of the piceous hue, on which he lays 

 particular stress ; and the reticulations of its surface (even in the 

 male sex) seem to be more coarse. "Whether it be the dilatatus, 

 however, or not, I may add that it differs from the guttatus in its 

 rather larger size and anteriorly broader outline, in its more finely 

 alutaceous (or "reticulated") surface, in its pro thorax being wider 

 in front, a little more rounded at the sides and with the hinder an- 

 gles more obtuse, in its three series of discal punctures being larger 

 (with the minute sutural ones evanescent), in its limbs being duller 

 (or more piceous), and in its whole body (particularly of the females) 

 being somewhat less shining. From the A. hkjuttatus (just described) 

 its rather more oblong (or less rounded) outline, loss convex body and 

 less polished surface, in conjimction with its rather smaller and more 

 triangular scutellum, its rather darker and subconcolorous limbs, its 

 rather narrower fore tibia? and not quite so broadly dilated anterior 

 male-feet, will at once remove it. 



The " var. /3 " may possibly be distinct ; nevertheless as I cannot 

 detect a character in it of sufficient importance to warrant its sepa- 

 ration, I have thought it safer not to treat it as such. It is on the 

 average a little smaller and more ovate than the type, just percep- 

 tibly more picescent, and perhaps if anything a trifle less convex. 

 Its limbs also are a shade paler, and its female sex somewhat more 

 opake. 



The A. consanguineus (which has likewise been communicated by 

 Dr. Crotch and the Barao do Castello de Paiva) is a common insect 

 throughout the intermediate elevations of Teneriffe, being chiefly 

 abundant in the streams and pools of the sylvan districts. — such as 

 at the Agua Garcia. Las Mercedes, &c. ; and I have also taken it, 



