228 proceedings of the national museum vol. 106 



Chittenden, F. H. 



1915. Harvest mites, or "chiggers." U. S. Dep, Agr., Farm. Bull. No. 

 671, pp. 1-7. 



Cookings, K. L, 



1948. Successful methods of trapping Trombicula (Acarina) with notes 

 on rearing T. deliensis Walch. Bui. Ent. Res., vol. 39, pp. 

 281-296. 



EwiNG, H. E. 



1921. Studies on the biology and control of chiggers. Bull. U. S. Dep. 



Agr. No. 986, pp. 1-19. 

 1925a. The adult of our common North American chigger. Proc. Biol. 



Soc. Washington, vol. 38, pp. 17-20. 

 1925b. A contribution to our knowledge of the taxonomy of chiggers, 



including the descriptions of a new genus, six new species and 



a new variety. Amer. Journ. Trop. Med., vol. 5, pp. 251-265. 

 1926a. The common box-turtle, a natural host for chiggers. Proc. Biol. 



Soc. Washington, vol. 39, pp. 19-20. 

 1926b. The life history and biology of the tree-toad chigger, Trombicula 



hylae Ewing. Ann. Ent. Soc. Amer., vol. 19, pp. 261-267, 

 1929a. Three new American chiggers (Acarina: Trombidiidae) . Proc. 



Ent. Soc. Washington, vol. 31, pp. 9-11. 

 1929b. Birds as hosts for the common chigger. Amer. Nat., vol. 63, 



pp. 94-96. 

 1929c. Four new species of chiggers (Acarina: Trombidiidae). Ent. 



News, vol. 40, pp. 294-297. 

 1929d. A manual of external parasites, xiv + 225 pp. 

 1931. A catalogue of the Trombiculinae or chigger mites of the New 



World with new genera and species and a key to the genera. 



Proc. U. S. Nat. Mus., vol. 80, art. 8, 19 pp. 



1937. New species of mites of the subfamily Trombiculinae with a key 



to tlie New World larvae of the akamushi group of the genus 

 Trombicula. Proc. Biol. Soc. Washington, vol. 50, pp. 167-173. 



1938. A key to the genera of chiggers (mite larvae of the subfamily 



Trombiculinae) with descriptions of new genera and species. 



Journ. Washington Acad. Sci., vol. 28, pp. 288-295. 

 1944a. Notes on the taxonomy of the trombiculid mites. Proc. Biol. 



Soc. Washington, vol. 57, pp. 101-104. 

 1944b. The trombiculid mites (chigger mites) and their relation to 



disease. Journ. Parasit., vol. 30, pp. 339-365. 

 1946a. Notes on trombiculid mites with descriptions of Walchiinae n. 



subf., Spectrombicula n. g., and Eutrombicula defecta, n. sp. 



Journ. Parasit., vol. 32, pp. 435-440. 

 1946b. Notes on the taxonomy of three genera of trombiculid mites 



(chigger inites), together with the description of a new genus. 



Proc. Biol. Soc. Washington, vol. 59, pp. 69-71. 

 1946c. Taxonomic notes on American chiggers (larvae of the mite family 



Trombiculidae), including the redescription of a genus and the 



descriptions of two new species. Proc. Biol. Soc. Washington, 



vol. 59, pp. 21-28. 



