I04 Mites Injurious to Domestic Animals. 



pressed out with the help of blunt needles. After treating with 

 potash, neutralize with strong acetic acid (50 per cent.), then wash 

 in water and pass into glycerine jelly. Glycerine jelly preparations 

 should be ringed with gold size, twenty-four hours after mounting, 

 and finally ringed again with some suitable cement. Soft bodied 

 mites such as Tyroglyphidae are best examined in liquid media such 

 as very weak glycerine, and. slides with a hollow cell should be used 

 for this type of mount, for built-up cells are liable to leak. For per- 

 manent preparations, euparal is very suitable. Specimens should 

 be passed through alcohols of increasing strength into absolute 

 alcohol and then into euparal. Whilst in alcohol they can be 

 stained with picric acid or Congo red, or other suitable chitin stains. 

 Farrant's medium is also very suitable for mounting mites, and 

 so are the various combinations with gum Arabic as a base (see 

 Lee's Microtomist's Vade-Mecum). 



LITERATURE. 



Owing to considerations of space only works of a comprehensive 

 nature are given below : — 

 Banks, Nathan. The Acarina or Mites. A Review of the 



Group for the use of Economic Entomologists. Report 



No. 108. Of&ce of the Secretary, U.S. Dept. Agric. 1915. 

 Berlese, Prof. A. Acabi, Myeiopoda et Scokpiones hujusque 



IN Italia Reperta. 1882-1903. 

 /(/. Gli Insetti, loro Organizzazione, Sviluppo, Abitudini 



E Rapporti coll' uomo. Vol. ii, Fasc. 1-6, 1912-13. 

 Canestrini, G. Prospetto dell' Acarofauna Italiana. In 8 



parts, 1885-1899. 

 Canestrini, G., and Kramer, P. Demodicidae und Sarcoptidab. 



" Das Tierreich," 7 Lieferung, 1899. 

 Hirst, Stanley. Studies on Acari. No. 1. The Genus Demodex, 



Owen. 1919. 

 Megnin, P. Lbs Parasites et Maladies Parasit aires. 1880. 

 Neumann, Prof. L. G. Traitk des Maladies Parasitairbs non- 



MlOROBIENNBS DES AnIMAUX DoMESTIQUES. 



Id. Parasites et Maladies Parasitaires des Oiseaux Dombs- 



tiqubs. Paris. 1909. 

 Id. Parasites et Maladies Parasitaires dd Chien et du 



Chat. Paris, 1914. 

 Railliet, Prof. A. Traitio de Zoologie Mkdicalb et Ageicole. 



2nd Edition. Paris, 1895. 



