CANARIAN COLEOPTEBA. 37 



60. Calathus auctus. 

 Calathus auctus, WolL, loc. cit. 349 (1862). 



Habitat Teneriffam humidam excelsam, in locis similibus ac piae- 

 cedens. 



As already implied, the rather smaller size and less widened out- 

 line of the present Calathus (the prothorax of which is especially- 

 narrower and more conical), in conjunction with its more elliptic 

 elytra (which have their basal line more curved, and their shoulders 

 consequently acuter or more porrect) and its more numerous discal 

 punctures, will at once separate it from the last species. It differs 

 also in its males having the elytra somewhat more opake (with the 

 interstices flatter), and the four hinder tibiae fimbriated along a 

 rather shorter portion of their inner edge. At the same time, I 

 would add that I am not perfectly satisfied that it may not be an 

 extreme state of that insect. The C. auctus is found in precisely 

 similar spots as the ciUatus, occurring in damp localities at a high 

 elevation on the mountains of Teneriffe. I took it, in company with 

 that species, during May of 1859 ; and it has been communicated by 

 Professor Heer of Zurich, as also by the Barao do CasteUo de Paiva. 



61. Calathus angustulus. 



Calathus angustulus, WolL, loc. cit. 349 (1802). 



Habitat Tencriff'am excelsam humidam, sub lapidibus corticeque 

 arborum laxo putrido, rarior. 



The comparatively narrow outline and pale reddish-brown hue of 

 this Calathus, combined with the shape of its prothorax (which is a 

 trifle narrower behind than before) and the exceedingly numerous 

 punctures down the alternate interstices of its elliptic elytra, wiU at 

 once characterize it. It is the only Canarian species in which I have 

 observed punctures on the first elytral interval, where there are 

 usually two or three at the extreme base. Its smaller size and less 

 margined, differently shaped prothorax, added to its more rounded, 

 less flattened elytra and more numerous impressions, will, apart from 

 other differences, readily separate it from the last species. Indeed, 

 in general contour it has perhaps more in common with the C. cari- 

 natus than with any other member of the genus here described ; but 

 its paler colour, and narrower and somewhat less depressed elytra 

 (with their more niunerous punctures and less arcuated basal line), 

 in combination with its posteriorly narrower prothorax and the fim- 

 briated hinder tibiae of its male sex, will immediately distinguish it 

 from that insect. 



