364 



MK. G. R. CROTCH ON AZOREAN COLEOPTERA. [Mar. 28, 



Stenolophus teutouus. 

 Tachys 4-signatus. 

 Parnus prolifericornis. 

 Dactylosteriium abdominale. 

 Cercyon littoiale. 



centromaculatum. 



Sapriims apricarius. 



dimidiatus. 



Psanimodius porcicollis. 



sabulosus. 



Mezium sulcatum. 

 Ilhizobius lituia. 

 Blaps gages. 

 Hegeter tristis. 



Opatrum hispidum. 

 Authicus hispidus. 

 Ilonialota longula. 



coriaria. 



Ilabrocerus caplllariconiis. 

 Conosomus sericeus. 

 Philonthus nigritulus. 

 Xaiitholinus hesperius. 

 Lithocharis ruficollis. 



debilicornis. 



Stenus guttula. 

 Platystethus spinosus. 

 TrogophlcEus riparius. 

 corticinus. 



Their European connexion being thus analyzed, it only remains 

 to trace their affinities to the other Atlantic groups, and first with 

 Madeira. 



The two have in common HO species, or very nearly three-fourths 

 of the entire fauna: (1) 97 of these, however, are common to the 

 Azores, Madeira, the Canaries, and Europe, and are hence unessen- 

 tial ; (2) 26 are found in Madeira and Europe, and of these 17 may 

 be considered introduced into both islands ; the remaining 9 indi- 

 genous species are as follows : — 



Pterostichus nigerrimus. 

 Amara trivialis. 

 Anisodactylus binotatus. 

 Harpalus rotundicollis. 

 distinguendus. 



Bembidium rufescens. 

 Phlceophagus spadix. 

 Homalota luridipennis. 

 Snnius gracilis. 



(3) Eight are found in Madeira and the Canaries, but not in 

 Europe as yet, viz. : — 



Cercyon inquinitum. Cryphalus aspericollis. 



Lsemophloeus clavicollis. Apion chalybeipenne. 



Paramecosoma simplex. Psylliodes vehemens. 



Corticaria maculosa. Silaria proteus. 



These represent the purely Atlantic species ; but the Paiameco- 

 sowa alone has strong claims to be considered really peculiar, or 

 *' autochthonous," to use Mr. Wollaston's expression. 



(4) Eight also have been found hitherto in the Azores and Ma- 

 deira only : — 



Trechus fimicola. Scymnus durantse. 



Bembidium schmidtii. Homalota oblique-puuctata. 



Malachius militaris. Philonthus jiroximus. 



Phlceophagus tenax. Homalium clavicorne. 



'Ihese show the strong connexion with Madeira, since five of these 

 are modified into insular species in the Canaries, but reach here 



