CANARIAN COLEOPTERA. 35 



In their very shining head and prothorax, and duller (though 

 scarcely opake) and lightly striated elytra, as well as in their general 

 hue and comparatively smaller size, the present Calathus and the 

 following one have much in common. Nevertheless the C. rectus is 

 the larger and flatter of the two, and has its limbs considerably 

 longer ; its head and prothorax also (the latter of which is a trifle 

 more elongate and wider behind, and has its edges more evidently 

 recurved) are more rufescent ; and the basal line of its elytra (ex- 

 tending from either shoulder to the scutellum) is less arcuate, — being, 

 in fact, almost perfectly straight. Whilst the following species occurs 

 only (so far as observed hitherto) in Lanzarote, the C. rectus is scat- 

 tered sparingly over the low and intermediate elevations of Teneriife. 

 I have taken it near S*^ Cruz and Orotava (at the latter of which it 

 was found likewise by Mr. Gray), as also on the mountains above 

 Taganana ; and it has been communicated by the Barao do Castello 

 de Paiva from Las Mercedes. 



I have but little doubt, from its size and superficial aspect, that it 

 is the insect referred by M. BruUe to the European C. fulvipes, — 

 with which, however, it has nothing, in reality, except its generic 

 characters, in common. 



58. Calathus simplicicollis. 

 Calathus simplicicollis, Wall, loc. cit. 347 (1862). 



Habitat Lanzarotam borealem, tempore hiberno et vernali sat fre- 

 quens. 



As may be gathered from what has already been said, the present 

 Calathus (which seems to be peculiar to Lanzarote) differs from the 

 last one in being a little smaller, narrower, and more convex, of a 

 slightly darker hue, and with its limbs considerably shorter. Its 

 prothorax, also, is somewhat less conical, with the sides more nar- 

 rowly rufescent and less recurved ; and the basal line of its elytra 

 (joining either shoulder with the scutellum) is more arcuate. It is 

 about the size and general outline of the common European G. mela- 

 nocephalus ; nevertheless it differs from all the specimens and all the 

 varieties of the latter which I have yet seen (including the peltatus, 

 Kolen., the ochropterus, Dufts., and the alpinus, Dej., for types of 

 which I am indebted to Dr. Schaum) in having its prothorax totally 

 free from the slightest trace of the two basal fovese which are always 

 more or less expressed in that insect, as also a trifle wider posteriorly, 

 and perfectly unmargined behind the hinder angles — which are, 

 themselves, a little more sharply defined (or more strictly rigJit an- 



d2 



