 | Alpheus Spring Packard - 1870 - 756 páginas
...Fig. 539. of Pediculus differs from that of Hemiptera geuerallv in the circumstance that the labium is capable of being retracted into the upper part...mistake, thought to be palpi and mandibles by Erichson, Juriuc and Landois, are simply lobes on the under side of a chitinous band. In Pediculus the thorax... | |
 | Connecticut. State Board of Agriculture - 1870 - 458 páginas
...[Hemiptera, bed-bug, etc.] generally, in the circumstance that the labiurn is capable of being retracted ipto the upper part of the head, which therefore presents...fold, which is extended when the labium is protruded. In order to strengthen this part, a flat band of chitine is placed on the under surface, just as the... | |
 | Leonard W. Sedgwick,Edited By - 1870 - 358 páginas
...the mouth is like that in the rfy-nchota generally, but differs in the circumstance that the labium is capable of being retracted into the upper part of the head, and has a fold in it when so retracted. In order to strengthen this part a flat band of chitine is... | |
 | 1871 - 812 páginas
...from that of Kliyiicliota [Hemiptera, bed-bug, etc.] generally in the circumstance that the labium is capable of being retracted into the upper part...fold, which is extended when the labium is protruded. In order to strengthen this part, a flat band of chitinc is placed on the under surface, just as the... | |
 | 1871 - 804 páginas
...differs from that of Rhynchota [Hemiptera, bed-bug, etc.] generally in the circumstance that the labium is capable of being retracted into the upper part...fold, which is extended when the labium is protruded. In order to strengthen this part, a flat band of chitine is placed on the under surface, just as the... | |
 | Alpheus Spring Packard - 1872 - 820 páginas
...Fig. 530. of Pediculus differs from that of Ilciniptera generallv in the circumstance that the labium is capable of being retracted into the upper part...fold, which is extended when the labium is protruded, lie also shows that those parts which were, by mistake, thought to be palpi and mandibles by Eric-hson,... | |
 | Alpheus Spring Packard - 1873 - 254 páginas
...mouth differs from that of the Hemiptcra (bed-bug, etc.) generally, in the circumstance that the labium is capable of being retracted into the upper part...fold, which is extended when the labium is protruded. In order to strengthen this part, a flat band of chitine is placed on the under surface, just as the... | |
 | Frederick Augustus Porter Barnard - 1877 - 916 páginas
...that the parts are softer and the labiuin is capable of being retracted intu the upper part of tho head, which therefore presents a little fold, which is extended when the labium is protruded. At tho base of the soft tube, which is strengthened by the long chitin >us ribbon-like mandibles, is... | |
 | James Nevins Hyde - 1883 - 618 páginas
...the mouth is like that in the rhynchotta generally, but differs in the circumstance that the labium is capable of being retracted into the upper part of the head, and has a fold in it when so retracted. In order to strengthen this part, a flat band of chitine is... | |
 | University of Minnesota. Agricultural Experiment Station - 1895 - 1192 páginas
...mouth differs from that of Rhynchota (as bed-bugs, etc.) generally, in the circumstance that the labium is capable of being retracted into the upper part...fold which is extended when the labium is protruded. In order to strengthen this part, a rlat band of chitine is placed on the under surface, just as a... | |
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Rhynchota [Hemiptera, bed-bug, etc.] generally in the circumstance that the labium is capable of being retracted into the upper part of the head, which therefore presents a little fold, which is extended when the labium is protruded. In order to strengthen... 
