CANARIAN COLEOPTERA. 



539 



810. Homalota longula. 



H. angusto-linearis, depressa, nigra, siibnitida, pubescens, confertis- 

 sime subtilissimeque coriaceo-alutacea ; capite punctiilis levissimis 

 obscuris superadditis dense obsito, in fronte foveolato ; prothorace 

 subquadrato, canaliculato ; elytris vix fuscescentioribus ; abdomine 

 confertissime subtilissimeque punctulato ; antennis gracilibus, ni- 

 gro-fuscis; pedibus brevibus, saturate testaceis. — Long. corp. lin. 1. 



Homalota longula (C'hevrier), Heer, Fna Col. Helv. 334 (1841). 



tbinobioides, Kraatz, in Stett. Ent. Zeit. xv. 125 (1854). 



, Id., Nat. der Ins. Deutsch. ii. 228 (1856). 



, WolL, Cat. Mad. Col. 175 (1857). 



Habitat Lanzarotam et Teneriffam, inter lapillos ad margines aqua- 

 rum degens. 



The exceedingly dense and fine sculpture of this small and narrow 

 Homalota (the bead, pro thorax, and elytra of which are most minutely 

 and closely coriaceo-alutaceous, whilst the abdomen is almost as 

 minutely and closely punctulated), combined with its depressed sur- 

 face, parallel outline, slender antennae, and rather short legs, will 

 sei-ve to distinguish it. When viewed beneath the microscope, its 

 head will be seen (in addition to the dense alutaceous sculpture) to 

 be somewhat thickly but very lightly subpunctulated. Like the 

 allied species, it is of subaquatic habits, residing amongst wet stones 

 and shingle at the edges of streams and pools. It is probably com- 

 mon throughout the Group, though, being so small and insignificant, 

 I do not happen to have observed it very generally. I have, however, 

 taken it sparingly in Lanzarote, as well as near S^'^Cruz in Teneriflfe. 

 It occurs also in Madeira. 



811. Homalota fragilis. 



H. pr^ecedenti valde similis, sed punctulis superadditis in capite (oculo 

 fortissime armato) miuoribus remotioribus (sc. minutissimis, leger- 

 rime observandis), abdomine paulo nitidiore et multo parcius scd 

 parum profundius punctulato ; pedibus pallidioribus (minus infus- 

 catis). — Long. corp. lin. 1. 



Homalota fragilis?, Kraatz, in Stett. Ent. Zeit. xv. 125 (1854). 

 ?, Id., Nut. der Ins. Deutsch. ii. 223 (1856). 



Habitat Teneriffam, Gomeram et Palmam, in locis similibus ac 

 prsecedens. 



Without the aid of the microscope this species is scarcely separable 

 from the preceding one, with which in its general fades it is almost 

 coincident. Nevertheless, when placed under a high magnifying 

 power, its abdomen will be seen to be very much less closely and 

 rather more coarsely punctulated, and with the additional punctules 



