CAXAEIAN COLEOPTERA. 39 



, females have their prothorax and elytra opake) will at once separate 

 it from all the others here enumerated. In their elytral impressions, 

 the present insect and the two following ones are on the ordinary- 

 type, — the number being reduced to 3 or 4 on the third interval ; 

 from which it would appear, that those species which have them more 

 or less increased are (according to the data hitherto accumulated) 

 confined to Teneriffe. The O. apjpencUculatus seems to be peculiar to 

 the sylvan regions of Grand Canary, — where, on the 21st of April 

 1858, I captured a few specimens of it, from beneath moist rotting 

 bark, in the remains of the ancient forest of El Dorames, on the 

 mountain-road between Gaidar and Teror. 



64. Calathus barbatus. 



Calathus barbatus, WolL, he. cit. 352 (1862). 

 Habitat Canariam Grandem, in regionibus El Monte et Tarajana 

 lectus. 



Like the last species, the O. barbatus would appear to be peculiar 

 to Grand Canary, — descending, however, into sw^sylvan spots of a 

 rather lower elevation than those tenanted by that insect. It may 

 be known from it by its very much smaller size and by its sexes 

 being almost equally shining, — its prothorax being in them both (as 

 indeed is the case with all the Canarian CalatJii except the appendi- 

 culatus) equally polished. In minor characters, its elytra are a 

 trifle more convex than those of the appendiculatus, and have their 

 basal line rather more curved ; and the four hinder tibiae of its 

 males are fimbriated along a rather shorter portion of their inner 

 edge. I took it, not uncommonly, in the region of El Monte, as 

 also on the mountains of Tarajana, during the spring of 1858, 



65, Calathus spretus. 

 Calathus spretus, Woll,, he. cit. 352 (1862). 



Habitat in Hierro, mense Februario a.d. 1858 repertus. 



In general aspect the present Calathus comes so near to the C. 

 barbatus, that, were it not for the essential differences displayed by 

 the male-tibine of the two species, I should not have hesitated to 

 consider them as identical ; but since the former has the four hinder 

 tibioe of its males almost simple internally, and the posterior pair 

 straight, whilst the latter has them powerfully fimbriated, with the 

 posterior ones slightly curved, I cannot but regard them as dis- 

 similar, and so lay greater stress on the other minute differences 

 which they display inter se than I should ordinarily have done. In- 



