SPERMATOGENESIS OF PEDICULUS VESTIMENTI. 381 



Sergent, E., Gillot, V., et Foley, H. 



'n Typhus recurrent Algerian. Sa transmission par les poux. C. R. Soc. 



Biol., 70. 

 Soueges, R. et Du Noyer, M. R. 



'17 Les Poux, le mal qu'ils nous causent. Bull, des Sciences Pharmacologiques 



t. XXIV. 

 Strong, Richard P. 



'18 Trench Fever. Report of Commission Medical Research Committee. 

 American Red Cross. Oxford University Press. 



EXPLANATION OF PLATES. 



All the sketches were drawn at a magnification of about 750. Zeiss horn, immer. 

 2 mm. 140 apo. oc. IV camera lucida. 



TECHNIQUE. 



Smear preparations stained with May-Griimvald followed|by Hollande. 



These stains were used in accordance with the method published by Dr. Langeron 

 (1916) and I am greatly indebted to him for many valuable suggestions and en- 

 couraging interest in my work. 



