CANARIAN COLEOPTEUA. 45 



Genus 24. PLATYDERUS. 



Stephens, III. Brit. Ent. i. 101 (1828). 



73, Platyderus alticola, n. sp. 



P. angustiilus, rufo-piceus, depressus ; capite prothoraceque nitidis, 

 hoc elongato-subciuadrato postice vix angiistiore, angulis posticis 

 subrectis, per basin ipsissimam panlo sinuato ; elytris clongato- 

 oblongis, subopacis, grosse alutaceis, ad hmncros valde acutis, 

 subcrenato-striatis, interstitio tertio punctis tribus notato ; an- 

 tennis, palpis pedibiisqiie pallidioribxis, 

 Var. /3 [an species distincta?], Paulo minor, paUidior ; prothorace 

 ad basin paulo magis recto (vix sinuato), angulis posticis rectiori- 

 bus ; elytris vix ovatioribus nitidioribus, paulo minus alutaceis, — 

 Long. Corp. lin, 4—41 (var, ft, 3i). 



Habitat sub lapidibus in montibus excelsioribus Teneriffae, usque 

 ad 8000' s. m, ascendens, Varietatis ft exemplar unicum, in monti- 

 bus inferioribus maritirais juxta Sanctam Crucem eaptum, solum vidi ; 

 forsan ad speciem secundam pertineat. 



This large and distinct Platyderus appears to be of the greatest 

 rarity, and to be confined to exceedingly elevated spots on the 

 mountains of Teneriffe, — where in May of 1859 I captured six 

 specimens of it, from beneath stones, on the lofty Cumbre, adjoining 

 the Canadas, above Ycod el Alto, It is partly in fact this pecu- 

 liarity of its habits which makes me look with suspicion on a single 

 specimen taken near S*'' Cruz (on the flanks of the low, maritime 

 range which forms the northern boundary of the Barranco do Passo 

 Alto), and which I have described above as a variety of the alticola. 

 It may possibly be the exponent of a closely allied species ; never- 

 theless, until further material has been obtained, I think it scarcely 

 safe to regard it as such. It is a little smaller and paler than the 

 examples from the Cumbre ; its prothorax is rather straighter (or 

 less sinuated) along the extreme base, and with the posterior angles 

 less obtuse ; and its elytra are a trifle more ovate (or expanded be- 

 hind the middle), and just perceptibly more shining (or less coarsely 

 alutaceous). 



74. Platyderus tenuistriatus, n. sp. 

 P. capite prothoraceque nitidis, Ulo nigro-piceo, hoc (una cum elytris) 

 rufo-piceo, subquadrato postice angustiore, angulis posticis ob- 

 tusiusculis, per basin ipsissimam vix sinuato, in disco antico sub- 

 convexo ; elytris oblongis, subopacis, subtilissime alutaceis, ad 

 humeros acutiusculis, tenuiter striatis, interstitio tertio puuctis 

 tribus parvis notato ; antennis, palpis pedibusque pallidioribus,- — 

 Long. Corp. lin. 3. 



Habitat Teneritfam, a W. D. Crotch semel tantum Icctus. 



