THE: ACARINA OF IOWA 207 



From Ames, August 12, 1912; by R. L. Webster. October Z, 1909; on 

 the collector's clothing; by H. K E. 



FESSONIA Heyden. 



F. longiUnealis (Ewing. ), Tr. Acad. Sci.., St. Louis, vol. XVIII, p. 

 Gi, (190i;). Ftom Ames, June 25, 19 — ; on Oribata latineisa Ewing; 

 under board; by J. E. G. 



Family TROMBIDUD.E. 



EUTROMBIDIUM Verdun. 



B. corticis Ewing, Bull. Amer. Mus. Nat. Hist., vol. XXXVII, pp. 

 155-156, (1917). From Ames, October 14, 1909; under bark; rare; 

 by H. E. E'. 



E. trigonum Hermann, Mem. Apt, p. 26, (1804). The locust mite. 

 From Ames, October 9, 1917; commonly found on Melanophcs femur- 

 rubrum, M. differentialis and also on Spharageon boili Scud; by the 

 writer. Also the following: Ames, August 21, 24, 26 and 30, 1910; on 

 ilf. differentialis ; by H. E. E. 



MICROTROMBIDIUM Haller. 



M. muscarum Riley, First Rept. U. S. Ent. Com., p. 306, (1878). 

 The house fly chigger. From Ames, August 30, 1910; by H. E. E. 

 Common on house fly. 



ENEMOTHROMBIDIUM Berlese. 



E. ovalis Ewing, Bull. Amer. Nat. Hist., vol. XXXVII, p. 156, (1917). 

 From Ames; running over ground; by H. E. 'E;. 



ALLOTHROMBIDIUM Berlese. 



A. pulvinus Ewing, Bull. Amer. Nat. Hist., vol. XXXVII, p. 157, 

 (1917). From Dallas Center, April, 1917; on apple tree; by W. F. 

 Chaney. 



Family GAMASID.^. 

 DERMANYSSUS Duges. 

 D. galUnae (Redi), Esper. Int. Insetti, pl. II, (1688). Megnin, Para- 

 sit., p. 115, (1880). The chicken mite. From Ames, summer, 1910. 

 The Auk, vol. XXVII, No. 3, July, p. 337, (1911); August 20, 1910; on 

 chicken, originally from English sparrow nest; by H. E. E. 



SEIUS Koch. 

 S. hirsiitiis Koch, Crust. Myr. Arach, (1835). From Ames, October 

 3, 1909; under old piece of wood; by H. E. E. 

 GAMASUS Latfeille. 



G. predator Banks, P. Ent. Soc. Washington, vol. XII, p. 5, (1910). 

 From Ames, October 14, 1909; under old piece of wood; by H. E. E. 



LIROASPIS Banks. 

 L. americana Banks, Can. Ent., p. 174, (1902). From Ames, October 

 2C, 1909, and September 11, 1910; under old piece of wood; by H. E. E. 



Family ARGASID.li:. 



ARGAS Latreille. 

 A. miniatus Koch, Arch. Naturg., vol. X, p. 219, (1844). The chicken 

 tick. Reported from Iowa; no locality given; in U. S. Dept. Agr. Bur. 

 Ent. Bull. 106, p. 47. 



