Sarcoptiformes 353 



hypopial stage may rest as long as six months before giving rise to the 

 active deutonymph. Michael 1901 states that the hypopus of G. spi- 

 nipes (Koch), however, is fully formed and capable of moving its 

 legs but is not able to walk. In the Acaridae, for example, the hypopi 

 are active and usually attach themselves on some insect or large mite 

 and are carried about. In no case, however, does the hypopus feed. 

 The deutonymph is very similar to the adult into which it changes 

 after a short resting period. 



Rejerences: 



Andre, M. 1941. Invasions de Glycyphages (Acariens). Bull. Soc. Zool. 



de France 66:142-148. 

 Hughes, T. E., and A. M. Hughes. 1939 (1938). The internal anatomy and 



post-embryonic development of Glycyphagus domesticus (DeGeer). 



Proc. Zool. Soc. London, Ser. B, 108(4) :714-733. 

 Joyeux, Ch., and G. Baer. 1945. Morphologie, evolution et position sys- 



tematique de Catenotaenia pusilla (Goeze, 1782), Cestode parasite de 



Rongeurs. Rev. Suisse de Zool. 52(2) : 13-51. 

 Prescott, R. T. M. 1933. Mites in seeds. J. Victoria Dept. Agr. (10) :519- 



523. 



Canestriniidae Berlese, 1884 



Figure 285 



Diagnosis: The body of these mites is hardly longer than it is wide 

 and may be flattened, round or oval, pentagonal or diamond-shaped. 

 The skin is either leathery or scaly. A pair of vertical setae is present, 

 and the chelicerae are normal and scissor-shaped. The tarsal claws 

 are frequently tiny and are completely wrapped up with the stalked 

 caruncles. No olfactory, rodlike sensory setae are found on tarsi i and 

 II. There are two pairs of genital suckers. Males may or may not have 

 adanal copulatory suckers. 



Genera: 



1. Canestrinia Berlese, 1881 



Type. Canestrinia dorcicola Berlese, 1881 



2. Acrotacarus Banks, 1915 



Type. Acrotacarus mirabilis Banks, 1915 



3. Amansia Oudemans, 1937 



Type. Dermaleichus chrysomelinus Koch, 1841 



4. Canestriniella Berlese, 1910 



Type. Canestriniella amplexans Berlese, 1910 



