Sarcoptiformes 



337 



. 1945. Tyroglyphid mites in stored products. Methods for the study 



of population density. Ann. Appl. Biol. 32 (l):71-75. 



. 1946. Tyroglyphid mites in stored products. Nature and amount of 



damage to wheal. Ann. Appl. Biol. 33 (3): 280-289. 



. 1946. Tyroglyphid mites in stored products. Ecological Studies. Ann. 



Appl. Biol. 33 (1): 82-97. 



Van den Bruel, W. E. 1940. Un ravageur de Fepinard d'hiver: Tyro-^ 

 glyphus dimidiatiis Herm. {longior Gerv.). Bull. Jnst. Agron. Gem- 

 bloux 9 (1-4): 81-99. 



Zakhvatkin, A. A. 1940. Key to mites injuring stores of agricultural prod- 

 ucts in U.S.S.R. (in Russian). Uchenye Zapiski Mosk. Godudarst 

 Univ. No. 42, 2 Vol., pp. 7-68. 



Forcelliniidae Oudemans, 1927 



Figures 263, 264 



Diagnosis: These mites have a 

 propodosomal shield and a shiny, 

 smooth (?) skin. On the posterior 

 part of the propodosoma is a 

 transverse row of four setae, the 

 inner pair being somewhat shorter 

 than the outer. The body setae 

 are mostly rodlike or narrow, 

 clubhke, and feathered. Cervical 

 setae are dorsal, feathered, comb- 

 like, and placed in a line with 

 trochanter i. A pair of vertical 

 setae are also present. The female 

 genital opening lies between coxae 

 III and IV while the male genital 

 opening is between coxae iv. The 

 male has adanal copulatory suck- 

 ers and two suckers on tarsi iv. 

 They have not been found since 

 the original descriptions and con- 

 sequently detailed knowledge of 

 their structure is not known. 



Figure 263 ForceUinia wasmanni 

 (Moniez). Dorsal view of female. 

 (After Michael 1903) 



