CANARIAN COLEOPTERA. 31 



the Canarian Calatlii for their immense size (the C. ciliatus, of the 

 second Section, being the only one which equals them in bulk), for 

 their prothoraces being narrower behind than in front (a structure of 

 rare occurrence in this genus), and for the discal punctures of their 

 elytra being obsolete. Inter se they may be known by the C. spho- 

 droides being darker than its ally, by the different shape of its 

 (more basally-punctured) prothorax, and by its elytra being some- 

 what less flattened, rounder posteriorly, and not so acuminated at 

 their apex. It is extremely rare, and confined to the sylvan regions 

 of Teneriffe, at intermediate and rather lofty elevations, — the only 

 specimens (seven in number) which I have seen having been captured 

 by myself, from beneath loose rotting bark, at the Agua Garcia ajul 

 in the woods above Taganana, 



50. Calathus acuminatus. 

 Calathus acuminatus, WoU., loc. cit. 342 (1862). 



Habitat Teneriffam sylvaticam, in iisdem locis ac proecedens. 



The C. acuminatus may be known from the last species by its more 

 piceous or rufescent hue ; by its prothorax being less conspicuously 

 narrowed behind, with the sides more elevated and more regularly 

 rounded in the middle (instead of before the middle, as in that insect), 

 less punctured towards the base, and with its anterior angles more 

 porrected and acute ; by its elytra being flatter, and more acuminated 

 at their apex ; and by its limbs being of a uniformly paler tint. It 

 occurs in precisely the same spots as the C. sphodroides, being pecu- 

 liar (so far as I have observed hitherto) to the wooded districts of 

 Teneriffe. Although rare, it is not quite so scarce as its ally. I have 

 taken it in the forest-region of the Ag-ua Mansa, above Ycod el Alto, 

 and at the sides of the Vueltas leading down from the Cumbrc to Taga- 

 nana. 



b. Corpus minoris magnitudinis, prothorace postice {ut in Calathis tii- 

 picis) plus minus latiore, punetis elytrorum discalibus plus minus 

 distinctis. 



51. Calathus rufo-castaneus. 



Calathus rufo-castaneus, Wall., loc. cit. 343 (1862). 

 Habitat in elevatis humidis sylvaticis Teneriffse, rarissimus. 



The pale rufo-castaneous hue of this distinct and rather large Ca- 

 lathus, in conjunction with its highly polished head and prothorax 

 (the latter of which is a good deal recurved, and somewhat pellucid, 

 towards the edges), the minute size of the discal punctures of its 



