BIOLOGY AND CONTROL OF CHIGGERS. 19 



LITERATURE CITED. 



(1) Berlese, A. 



1912. trombidiidae. In Redia, v. 8, p. 1-291, figs. 1-137. PI. I. 



(2) Chittenden, F. H. 



1906. harvest mites, or " chiggers." U. S. Dept. Agr., Bur. Ent., Circ. 77. 

 6 p., 3 figs. 



(3) 



1914. concerning remedies for chiggers. In Jour. Econ. Ent., v. 7, no. 1, 

 p. 152. 



(4) Heerick, G. W. 



1914. insects injurious to the household and annoying to man. Mac- 



millan Co. 470 p., illus. 



(5) — 



1915. some external parasites of poultry. Cornell Agr. Exp. Sta., Bui. 



359, p. 230-268. 



(6) Howard, C. W. 



1918. a preliminary report on the trombidiidae of Minnesota. In Sev- 

 enteenth Rept. State Ent. Minn., p. 111-144, Pis. V-XI. 



(7) Kitashima, T., und Miyajima, M. 



1918. STUDIEN UEBER DIE TSUTSUGAMUSHI-KRANKHEIT. KitaSatO Arch. 



Exp. Med., v. 2, no. 2, p. 91-146, figs. 1-4 ; and PI. I-IV ; v. 2, no. 

 3, p. 237-334, PI. V-XIII. 



(8) Osborn, H. 



1896. insects affecting domestic animals. U. S. Dept. Agr., Div. Ent., 

 Bui. 5, 302 p., illus. 



(9) OUDEMANS, A. C. 



1912. DIE BIS JETZT BEKANNTEN LARVEN VON THROMBIDHDAE UND ERY- 



thraeidae. Zool. Jahrb., Sup. 14, 230 p., figs. 



(10) Riley, C. V. 



1873. harvest mites. In Amer. Nat., v. 7, p. 16-19, fig. 5. 



(11) Riley, W. A., and Johannsen, O. A. 



1915. handbook of medical entomology. 348 p., illus. Ithaca. 



(12) Washburn, F. L. 



1908. the irritating harvest mite or " jigger." In Twelfth Rept. State 

 Ent. Minn., p. 156-158, fig. 80. 



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