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Show 364 MR. G. R. CROTCH ON AZOREAN COLEOPTERA. [Mar. 28, Stenolophus teutouus. Tachys 4-signatus. Parnus prolifericornis. Dactylosternum abdominale. Cercyon littorale. centromaculatum. Saprinus apricarius. dimidiatus. Psammodius porcicollis. sabulosus. Mezium sulcatum. Rhizobius litura. Blaps gages. Hegeter tristis. Opatrum hispidum. Anthicus hispidus. Homalota longula. coriaria. Habrocerus capillaricornis. Conosomus sericeus. Philonthus nigritulus. Xantholinus hesperius. Lithocharis ruficollis. debilicornis. Stenus guttula. Platystethus spinosus. Trogophloeus 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 140 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 unessential ; (2) 26 are found in Madeira and Europe, and of these 17 may be considered introduced into both islands; the remaining 9 indigenous species are as follows :- Pterostichus nigerrimus. Bembidium rufescens. Amara trivialis. Phlceophagus spadix. Anisodactylus binotatus. Homalota luridipennis. Harpalus rotundicollis. Sunius gracilis. distinguendus. (3) Eight are found in Madeira and the Canaries, but not in Europe as yet, viz.:- Cercyon inquinitum. Cryphalus aspericollis. Leemophloeus clavicollis. Apion chalybeipenne. Paramecosoma simplex. Psylliodes vehemens. Corticaria maculosa. Silaria proteus. These represent the purely Atlantic species ; but the Paramecosoma 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 Madeira only :- Trechus fimicola. Scymnus durantee. Bembidium schmidtii. Homalota oblique-punctata. Malachius militaris. Philonthus proximus. Phlceophagus tenax. Homalium clavicorne. These show the strong connexion with Madeira, since five of these are modified into insular species in the Canaries, but reach here |
