CARABID^E. 37 



different and opposite local conditions which would scarcely be the 

 case had its inherent tendency for variation occasioned it to assume 

 a separate state in Madeira, whilst remaining constant in four other 

 islands which are more or less remote inter se. 



The 0. glabratus is common in Grand Canary, Teneriffe, Gomera, 

 and Hierro, occurring independently of altitude ; but in Palma it has 

 not yet been observed, its place being there supplied by the following 

 species. In the two eastern islands of the Group, Lanzarote and 

 Fuerteventura, I do not expect that it will be found to exist. 



105. Olisthopus palmensis. 



Olisthopus palmensis, Woll, Cat. Can. Col. 42 (1864). 

 Habitat Canarienses (Palma), in sylvaticis subsylvaticisque degens. 



Found only, hitherto, in Palma, of the Canarian Group where it 

 is locally common at intermediate altitudes, particularly within the 

 sylvan regions. Although so distinct from the glabratus as to remove 

 all doubt concerning the specific value of its characters, it is never- 

 theless very remarkable that it should take the place apparently of 

 that insect in the above-mentioned island. I may add, however, on 

 the other hand, that we are scarcely yet perhaps in a position to assert 

 positively that the glabratus proper does not occur (simultaneously 

 with the palmensis) in some of the remoter districts of Palma. 



106. Olisthopus ericse. 



Olisthopus Ericaj, Wott., Ins. Mad. 37, tab. i. f. 8 (1854). 

 , Id., Cat. Mad. Col. 13 (1857). 



Habitat Maderenses (Mad.), in sylvaticis editioribus hinc inde vul- 

 garis ; praesertim sub fibris Ericarum laxis aridis congregans. 



Occurs in the higher elevations of Madeira proper, principally on 

 the upper limits of the sylvan districts, from about 4000 to 5000 

 feet above the sea. It may often be found in abundance, harbouring 

 beneath the loose outer fibre of the gigantic Heaths the Erica ar- 

 borea and scoparia, Linn. 



107. Olisthopus elongatus. 



Olisthopus elongatus, Wott., Ins. Mad. 38 (1854). 

 , Id., Cat. Mad. Col 14 (1857). 

 -, Id., Cat. Can. Col. 44 (1864). 



- glabratus, Hart, [nee Bridle]. Geoloq. Verhdltn. Lanz. undFuert. 

 140, 141. 



Habitat Maderenses (Mad., P to S to ) et Canarienses (Lanz., Fuert.), 

 hinc inde sub lapidibus parum vulgaris. 



