. Monographs of the Diptera of North America [microform] / prepared for the Smithsonian Institution by R. Osten Sacken. Diptera; Insects; Diptères; Insectes. The snnrll materials in my possession do not allow me to the description of the apparently new species. At the smut lime, the existinjj; descriptions are too incomplete or too in- foncet to admit of a positive idontilication. The description of T- bimacula Walker, for instance, is snch as to render it very douhtful whether the species given above under that name is really Walker's species; the character, "abdomen with alter
. Monographs of the Diptera of North America [microform] / prepared for the Smithsonian Institution by R. Osten Sacken. Diptera; Insects; Diptères; Insectes. The snnrll materials in my possession do not allow me to the description of the apparently new species. At the smut lime, the existinjj; descriptions are too incomplete or too in- foncet to admit of a positive idontilication. The description of T- bimacula Walker, for instance, is snch as to render it very douhtful whether the species given above under that name is really Walker's species; the character, "abdomen with alternate tawny and brown rings," is not visible in my specimens. A large number of specimens and a comparison with the European species will be necessary to those who will attempt the description of the North American species. 17 ',.*â ! ^m^ ' i â¢â¢.';. 'â â '^rm ';','T, ' 1 â ' il. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Osten-Sacken, C. R. (Carl Robert), 1828-1906. Washington : The Institution
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectd, booksubjectinsects
