CONTENTS 



Page 

 Robert Evans Snodgrass, insect anatomist and morphologist, by Ernes- 

 tine B. Thurman I 



Bibliography of R. E. Snodgrass between the years i8g6 and 1958, com- 

 piled by Ernestine B. Thurman 19 



Contributions to the problem of eye pigmentation in insects : Studied by 

 means of intergeneric organ transplantations in Diptcra, by Dietrich 



BODENSTEIN 23 



The structure and some aspects of development of the onychophoran head, 



by F. H. Butt 43 



The external anatomy of the South American semiaquatic grasshopper 

 Marellia remipes Uvarov (Acridoidea, Pauliniidae), by C. S. Car- 



BONELL 61 



The first leg segments in the Crustacea Malacostraca and the insects, by 



F. Carpentier and J. Barlet 99 



Spinasternal musculature in certain insect orders, by L. E. Chadwick. . . 117 

 The nerves and muscles of the proboscis of the blow fly Phormia rcgina 



Meigen in relation to feeding responses, by V. G. Dethier 157 



Morphology of the larval head of some Chironomidae (Diptera, Nematoc- 



era) , by Franqois J. Gouin 175 



The problems of "morphological adaptation" in insects, by Guido Grandi. 203 



The shaping of the egg strings in the copepods, by Poul Heegaard 231 



Mechanism of feeding in Hemiptera, by M. A. H. Qadri 237 



Studies on the molecular organization of insect cuticle, by A. Glenn Rich- 

 ards and Rudolph L. Pipa 247 



Metachemogenesis — postemergence biochemical maturation in insects, by 



Morris Rockstein 263 



A physiological approach to the relation between prey and predator, by 



K. D. RoEDER 287 



The cervicothoracic nervous system of a grasshopper, by John B. 



Schmitt 307 



Notes on the mesothoracic musculature of Diptera, by John Smart 331 



The metathoracic musculature of Crymodes devastator (Brace) (Noctui- 



dae) with special reference to the tympanic organ, by Asher E. 



Treat 365 



The phylogenetic significance of entognathy in entognathous apterygotes, 



by S. L. Tuxen 379 



