576 CANARTAN COLKOPTKRA. 



spring of 1858, in Grand Canary — on the mountains above San Mateo, 

 in the direction of the Roca del Soucilho. 



§ V. Proiliorax {et caput) plus minus crehre punctatus, lined media 

 lonf)itudinali la'vi. 



878. Philonthus sericeus. 

 P. plumbeo-niger, alutaceus, subopacus ; capite (subtriangnlari-qua- 

 drato) prothoraceque utrinqne dense punctatis ; elj^tris depressis, 

 densissime et breviter fiilvo-cinereo-scriceis ; antennis pedibusque 

 ferrugineis, illis ad basin tibiisque saepius paulo picescentioribus. — 

 Long. Corp. lin. 1|-2|. 



Remus sericeus, Holme, Trans. Ent. Soc. Loud. ii. 64 (1837). 



, Stepli., Man. Brit. Col. 401 (1839). 



Philonthus sericeus, Erich., Gen. et Spec. Staph. 509 (1839). 



Habitat Lanzarotam et Fuerteventnram, per oras arenosas mari- 

 timas sub confervis et rejectamentis degens. 



The P. sericeus may be distinguished by its alutaceous, subopake, 

 leaden-hlack surface (the head and prothorax of which are coarsely 

 and regularly punctured on either side, whilst the elytra and abdomen 

 are very densely and minutely so, as well as closely beset with a short 

 fulvo-cinereous pnbcscence) and by its ferruginous or piceo-ferru- 

 ginous limbs. Its head is somewhat triangular-quadrate (being very 

 straightly truncated behind) and its elytra are much flattened. It 

 is strictly a littoral species, occurring (as in more northern latitudes) 

 under sea-weed on the sandy shores. In such situations it was taken 

 by Mr. Gray and myself, during January 1858, both to the south of 

 Arrecife in Lanzarote and of Puerto de Cabras in Fuerteventura — 

 where I again met with it in the spring of the following year. 



879. Philonthus tenellus, n. sp. 



P. angustus, niger elytris paulo picescentioribus, nitidus ; capite 

 (convexo, subquadrato, apice siibtriangulariter impresso) protho- 

 raceque utrinque parce punctatis ; elytris densius subtihusque 

 punctatis, parce cinereo-pubescentibus ; abdominis segmentis sin- 

 gulis (praesertim basalibus) convexis et postice grosse denseque 

 j)unctatis ; antennis pedibusque piceo-ferrugineis, illis ad basin 

 tarsisque clarioribus ; palporum articulo ultimo acutissime eonico. — 

 Long. Corp. lin. l|-2. 



Ohs. — Species P.filifonni (insularum Maderensium) valde affinis, 

 sed difFert capite paulo convexiore oculis majoribus, elytris sensim 

 profundius punctatis abdominisque segmentis singulis convexi- 

 oribus et (praesertim basalibus) postice grosse ac dense punctatis. 



Habitat TenerifFam, inter lapillos ad marginem paludis cTijusdam 

 prope Sanctam Crucem copiose deprehensus. 



In its small size, extremely narrow outline, subquadrate head. 



