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Show 744 MR. F. o. PICKARD C A M B R I D G E O N [June 16, One would be inclined to consider that possibly a separate species is in process of differentiation, and that the further westwards it extended the more decided might be the differential characters. Of course this is only a theory, as regards the latitudinal distribution of the forms, which would be at once upset by grizzled specimens from Para, for instance. The difference, however, is so striking, that one would not hesitate to regard the grizzled form as decidedly a different species from the red, when alive in all the fresh beauty of its grey-green colouring; until careful comparison proves that the difference is, so far, but one of coloration, having apparently no structural counterpart. Species which probably belong to the genus Avicularia. 1848. Mygale hlrsutlsslma, C. K., $, Die Arachn. ix. p. 76. South America. In coll. J. Sturm, Niirnberg. 1848. Mygale leporlna, C. K., o*, Hie Arachn. ix. p. 55. Bahia. Mus. Berlin. 1848. Mygale diversipes, C. K., $, Die Arachn. ix. p. 65. Brazil. Mus. Berlin. 1848. Mygale laeta, C. K., $, Die Arachn. ix. p. 66. Porto Bico. Mus. Berlin. 1848. Mygale cassia, C. K., $ , Die Arachn. ix. p. 88. Porto Bico. Mus. Berlin. 1848. Mygale detrita, C. K., 8 , Die Arachn. ix. p. 86. Brazil. Mus. Munich. 1848. Mygale ivalckenaerli, Perty, Del. An. Artie, p. 191, t. 38. 2. Brazil. 1871. Avicularia vulplna, Auss., Verhandlungen &c, Wien, 1871, p. 202. Brazil. " 1876. Avicularia rutilans, Auss., 6 , Verhandlungen &c, Wien, p. 184. New Granada. 1876. Avicularia metalllca, Auss., Verhandluugen &c, Wien, p. 185. Surinam. 1889. Avicularia velutlna, Sim., 2 > Ann. Soc. Ent. Fr. 1889, p. 213. Venezuela. 1890. Avicularia holmbergii, Thor., A.nn. Mus. Genov. (2) vm. p. 399. Hab.? 1891. Avicularia glauca, Sim., rf, Ann. Soc. Ent. Fr. 1891, p. 312. Panama. Genus TAPINAUCHENIUS, Ausserer, 1871. (Plate XXXIV. fig. 21.) Syn. 1842. Mggale, C. Koch, Die Arachniden, ix. p. 67. 1850. Eurypelma, C. Koch, Uebersicht. Type. T. plumlpes (C. K.), cS, Die Arachniden, ix. p. 67, tab. cccxi. fig. 733, 1842. In coll. Mus. Imp. Berhn. Generic Characters. Anterior row of eyes straight or nearly so. Legs of first pair equal to those of the fourth. Three pairs of sternal sigilla visible-1st |
