16 Circular 218, U. S. Depi. of Agriculture. 



11) Maassen. 



1911. zur aetiologie und epidemiologie der ruhr bei dex biexen volkerx. 



7/i Mitt. K. Biol. Anst. Land. u. Forstw.. heft 11. March, p. 50-54. 



(12) and Nithack. 



1910. uber die ruhr der bienex. In Mitt. K. Biol. Anst. Land. u. Forstw., 



heft 10, p. 39-42, March. 



(13) Petersex, Haxs. 



1912. beitrage zur vergleichexdex physiologie der verdauuxg. v. die 



verdauuxg der hoxigbiexe. In Pfliiger's Archiv fur die gesammte 

 Physiologie des Menschen und der Tiere, v. 145, p. 121-151, 1 fig., 2 pis. 



(14) Phillips, E. F. 



1911. the treatmext of bee diseases. U. S. Dept. Agr., Farmers' Bui. 442, 



22 p., 7 figs. 



(15) and Demuth, George S. 



1914. THE TEMPERATURE OF THE HOXEYBEE CLUSTER IX WINTER. U. S. Dept. 



Agr., Bulletin 93, 16 p., 2 figs. 



(16) PIXELL-GOODRICH, HELEN L. M. 



1920. determixatiox of age in hoxeybees. In Quarterly Jourru Micros. Sci.. 



n. s., no. 254, v. 64, pt. 2, January, p. 191-206, pi. 11. 



(17) Rexxie, John. 



1921. xotes ox acarixe disease, parts i-vh. In The Bee World, v. 2, no. 12, 



p. 144-145; v. 3, nos. 1-6, p. 5-7. 35-36, 66-67, 95-96, 115-117, 14-5-146, 

 figs. 3-5. 68-74. 



(18) 



1921. ISLE OF WIGHT DISEASE IX HIVE BEES — ACARIXE DISEASE: THE ORGANISM 

 ASSOCIATED WITH THE DISEASE — TARSOXEMUS WOODI, X. SP. In Trans. 



Roy. Soc. Edin., v. 52, pt. 4. no. 29, p. 768-779, 1 pi., 2 figs. 

 References, p. 778. 



(19) White, Philip Bruce, and Harvey, Elsie J. 



1921. isle of wight disease ix hive bees. (1) The etiology of the disease. 

 In Trans. Roy. Soc. Edin., v. 52, pt. 4, no. 29, p. 737-754. 1 pi. 

 Literature cited, p. 754. 



(20) Turessox, Gote. 



1917. THE TOXICITY OF MOULDS TO THE HOXEYBEE, AND THE CAUSE OF BEE- 

 PARALYSIS. In Svensk Botanisk Tidskrift, Band 11. p. 16-38. 

 Literature cited, p. 36-38. 



(21) White, P. Bruce. 



1921. the pathology of isle of wight disease ix hive bees. In Trans. Roy. 

 Soc. Edin., v. 52, pt. 4, no. 29. p. 755-764, 1 pi. 

 References to literature, p. 763. 

 Zander, Exoch. 



l909. tierische parasitex als kraxkheitserreger bei der biexk. in leip- 

 siger Bienenzeitung, Jahrg. 24. heft 10, p. 147-150, 2 figs.; and heft 11. 

 I». 164-166. (Also in Miinchener Bienenzeitun?. 1909. heft 9.) 

 



1011. KRANKHEITEN UND SCHADLIXGE DER ERWACHSEXEX BIEXEN. 42 p.. S pi., 



L3 figs. Stuttgart. (Handbuch der Bienenkunde II.) 



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