28 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 97 



REFERENCES 

 Berlese, a. 



1910. Gli insetti, vol. i. Milan. 

 Burgess, E. 



1880 a. The structure and action of a butterfly's trunk. Amer. Nat., vol. 14, 



PP- 313-319- 

 1880 b. Contribution to the anatomy of the milkweed butterfly. Anniv. 

 Mem. Boston Soc. Nat. Hist. 



JOBLING, B. 



1929. A comparative study of the structure of the head and mouthparts in 

 the Streblidae (Diptera Pupipara). Parasitology, vol. 21, pp. 417- 

 444. 

 Kellogg, V. L. 



1893. The sclerites of the head of Danaus archippus. Kansas Univ. Quart., 

 vol. 2, pp. 51-59. 



1895. The mouthparts of the Lepidoptera. Amer. Nat., vol. 29, pp. 546-556. 



KiRBACH, P. 



1883. Uber die Mundwerkzeuge der Schmetterlinge. Zool. Anz., vol. 6, pp. 

 553-558. 

 Snodgrass, R. E. 



1932. Evolution of the insect head and the organs of feeding. Ann. Rep. 



Smithsonian Inst, for 1931, pp. 443-489. 

 1935. Principles of insect morphology. McGraw-Hill Book Co., New York. 

 Tillyard, R. J. 



1923. On the mouth-parts of the Micropterygoidea. Trans. Ent. Soc. Lon- 



don, vol. 71, pp. 181-206, 12 figs. 

 Weber, H. 



1924. Das Thorakalskelett der Lepidopteren. Ein Beitrag zur vergleichenden 



Morphologic des Insektenthorax. Zeitschr. Anat. und Entwick., 

 vol. 72>, PP- 277-331, 9 figs. 



