. Smithsonian miscellaneous collections. T 1 1 r OK THE PbISMATIC SoLAR SptCTRLM. The n region. Wave-lengths 15200 to 18200 Angstroms. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME 82. NUMBER 2 THE THORACIC MECHANISM OF A GRASSHOPPER, AND ITS ANTECEDENTS BY R. E. SNODGRASS Bureau of Entomology,U. S. Department of Agriculture. (Publication 3027) CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION DECEMBER 31, 1929 Z^c Botb (^afttmore (preee BALTIMORE, MD., U. S. A. THE THORACIC MECHANISM OF A GRASSHOPPER,AND ITS ANTECEDENTS By R. E. SNODGRASS Bureau of Entomology U
. Smithsonian miscellaneous collections. T 1 1 r OK THE PbISMATIC SoLAR SptCTRLM. The n region. Wave-lengths 15200 to 18200 Angstroms. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME 82. NUMBER 2 THE THORACIC MECHANISM OF A GRASSHOPPER, AND ITS ANTECEDENTS BY R. E. SNODGRASS Bureau of Entomology,U. S. Department of Agriculture. (Publication 3027) CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION DECEMBER 31, 1929 Z^c Botb (^afttmore (preee BALTIMORE, MD., U. S. A. THE THORACIC MECHANISM OF A GRASSHOPPER,AND ITS ANTECEDENTS By R. E. SNODGRASS Bureau of Entomology U. S. Department of Agriculture CONTENTS PAGE Introduction i I. General discussion 3 The thoracic terga 5 The thoracic pleura 10 The thoracic sterna 2i II. The thoracic skeleton of Dissostcira 33 The cervical sclerites 33 The prothorax 34 The pterothorax ^7 III. The thoracic muscles of Dissostcira 51 Muscles of the neck and prothorax 53 Muscles of the pterothorax 59 The mesothoracic muscles 60 The metathoracic muscles 66 IV. The legs and their muscles 72 Structure of the legs 73 Muscles of the legs 78 V. The wings and their mechanism 84 Structure of the wings 84 The wing mechanism 92 VI. The spiracles 99 Abbreviations used on the figures 108 References I09 INTRODUCTION The principal elements in the motor mechanisms of arthropods arethe musc
Size: 1589px × 1573px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
