258 Acarology 



important birds and animals. In Australia Trombicula (Emrombicuui) 

 sarcina is an important pest of sheep. Apolonia tigipioensis deplumes 

 chickens. Species of Neoschongastia are also harmful to poultry, as 

 are the common pest chiggers. 



Trombiculids are as well known as any of the other mites and yet 

 the 300 or more described species probably do not represent more 

 than half the species that will eventually be known. 



References: 



Berlese, A. 1912. Trombidiidae. Redia 8:1-291. 



Ewing, H. E. 1944. The trombiculid mites (chigger mites) and their rela- 

 tion to disease. J, Parasitol. 30:339-365. 



Lawrence, R. F. 1949. The larval trombiculid mites of South African ver- 

 tebrates. Ann. Natal Mus. 11:405-486. 



Philip, C. B. 1948. Tsutsugamushi disease (scrub typhus) in World War 

 II. J. Parasitol. 34:169-191. 



Thor, S., and C. Willmann. 1947. Trombidiidae. Das Tierreich Lfg. 71b: 

 187-541 + Pis. XXIX-XXXVI. 



Wharton, G. W. 1947. Studies on North American chiggers II. The sub- 

 families and Womersia strandtmani, n. gn., n. sp. J. Parasitol. 33: 

 380-384. 



, D. W. Jenkins, J. M. Brennan, H. S. Fuller, G. M. Kohls, 



and C. B. Philip. 1951. The terminology and classification of trom- 

 biculid mites (Acarina: Trombiculidae). J. Parasitol. 37(1): 13-31. 



