120 THE FLEA 



479 ; (1907) Vol. 14, p. 329 ; (1909), Vol. 16, pp. 53, 57, 61, 

 and 332 ; (1906) Notes on Bat-fleas, Vol. 13, p. 186. 



These papers contain, for the most part, descriptions of 

 new species in the writer's collection. Many fine plates 

 illustrating morphology and structure of the external 

 skeleton. 



B. The following references are to papers on the 

 systematic position of the Siphonaptera and their 

 relationship to other insects. 



1. KRAEPELIN (1884), Ueber die systematische Stellung der 



Puliciden. Hamburg, 1884. 



2. PACKARD (1894), The Systematic Position of the Siphon- 



aptera. Proc. Boston Nat. Hist. Society, Vol. xxvi., p. 312. 



3. DAHL (1897), Puliciphora, cine neue flohanliche Fliegengat- 



tung. Zoologischer Anzeiger, Vol. xx., p. 409. 



4. WANDALLECK (1898), 1st die Phylogenese der Aphaniptera 



entdeckt? Zoologischer Anzeiger, Vol. xxi., p. 180. 

 A humorous reply to Dahl. 



5. DAHL (1899), Die Stellung der Puliciden im System. Archiv 



fur Naturgeschichte, Vol. 65, i. p. 71. Plates. 



6. HEYMONS (1899), Die systematische Stellung der Puliciden. 



Zoologischer Anzeiger, Vol. xxn., pp. 223 and 301. Three 

 figures. 



A destructive criticism of the views advanced by Dahl. 



7. SEMENOV (1904), Zur Frage der systematischen Stellung der 



Flohe. Revue Russe d'Entomologie, Vol. iv., p. 277. In 

 Russian. 



