186 CANADIAN COLEOPTEKA. 



Dr. Schaum ; nevertheless it has its elytra just perceptibly narrower 

 and longer than is the case in that species, as also less ventricose on 

 their hinder disc (or less incurved posteriorly), very much less plicate 

 at the shoulders, and with the extreme basal rim less elevated ; the 

 anterior angles of its prothorax are somewhat more rounded off; 

 and its tarsi are a trifle longer and slenderer. 



I have given a provisional name, in the event of their proving to 

 be specifically distinct, to the specimens which I have regarded as 

 the " var. /3." I think, however, it would be scarcely safe, at any 

 rate until further evidence is obtained, to treat them as more than 

 a local modification ; though, at the same time, when viewed even 

 beneath an ordinary lens, they are easily separable from the normal 

 examples. They have been taken hitherto only in Gomera and the 

 higher regions of Teneriffe ; and differ in having their prothorax a 

 trifle more evidently punctured, and their elytra (which are perhaps 

 just perceptibly narrower, and have their abbreviated subhumeral 

 plicse rather more developed) sparingly beset with comparatively long 

 and erect hairs. 



The T. ccmariensis is universal throughout the archipelago ; though, 

 at the same time, I should state that the only example which has 

 hitherto been taken in Gomera belongs to the " var. (3 " (which, as 

 already implied, may 2iossibhj be distinct). I have captured it, how- 

 ever, in its normal state, on the rocky groiuid immediately behind 

 the Salinas, in the extreme north of Lanzarote (where a single spe- 

 cimen was first detected by Mr. Gray, during January 1858) ; at La 

 Antigua, and in the Rio Palmas, of Fuerteventura ; at a high eleva- 

 tion, close to the Roca del Soucilho, on the mountains of Grand 

 Canary ; near the Puerto Orotava, in Teneriffe ; in the Barranco 

 above S*"* Cruz, of Palma ; and near Valverde, in Hierro. It occurs 

 beneath stones, and either actually in Ants' nests or in the imme- 

 diate vicinity of them. 



Of the " var. /3 " a single specimen was found by Mr. Gray in the 



Barranco above San Sebastian, of Gomera ; and I have myself taken 



it in Teneriffe — namely at the Agua Mansa, and on the lofty Cumbre 



(adjoining the Caiiadas) above Ycod el Alto, at an elevation of more 



than 8000 feet. 



299. Thorictus vestitus, n. sp. 



T. praecedenti similis, sed vix minor angustior, paulo minus nitidus 

 (oculo fortissimo armato minutissime alutaceus), profundius punc- 

 tatus ct pube elongata robusta demissa fulvescente ubique parce 

 vestitus ; prothorace ad basin ipsissimam paulo magis constrieto ; 

 elytris ad basin ipsissimam Uneii tenuissima (subobsoleta, vix ob- 



