22 BRITISH 



glyphidse, gives some very short remarks on the 

 external anatomy and biology, but not any internal 

 anatomy. The work is unquestionably one of the 

 most important existing upon the Acari, and is 

 indispensable to every acarologist. 



Dr. A. Nalepa, in 1884, 1885, wrote a paper,* which 

 is far the most important that we possess on the 

 anatomy of the Tyroglyphidae ; it will be found con- 

 stantly referred to in Chapter V of this book on the 

 anatomy of the family. The first part of Nalepa's 

 paper is almost entirely upon the anatomy of Tyro- 

 glyphus longior, the second part upon that of Carpo- 

 glyphus anonymus. Modern methods of section cutting, 

 etc., were employed in the investigation, and the whole 

 paper is excellent and sufficiently illustrated. 



Prof. G. Canestrini, in 1888, published two important 

 treatises on the Italian Tyroglyphidse.f The first was 

 a separate work, the second a portion of the author's 

 general work on the Italian Acari. To say that these 

 are by Prof. Canestrini is equivalent to saying that 

 they are highly valuable ; no student of the family 

 could safely dispense with them. The volume of the 

 general work appeared after the special work, and is 

 necessarily greatly a repetition of it, but not entirely 

 so. Both are chiefly classificatory, but some highly 

 interesting biological observations are added; there 

 practically is not any internal anatomy. 



The two last-named authors, Canestrini and Berlese, 

 in 1885 wrote a joint paper,! in which they made 

 known the adult form of TricJwtarsus xylocopse. Only 

 the hypopial nymphs of this genus had been known 

 previously, and in consequence of the very considerable 

 differences between them and other hypopi it had been 



* "Die Anatomie der Tyroglyphen," Abtheilung i, in * S. B. Ak. 

 Wien,' Bd. xc, Abtli. i (1884), pp. 132; Abth. ii (1885); ibid., Bd. 

 xcii, Abth. i, pp. 116167. 



f "I Tiroglifidi Studio critico," Padova, 1888, 'Prospetto dell' 

 acarofauna italiana," vol. iii, Padova, 1888. 



J " Nota intorno a due Acari poco conosciuti," in ' Atti. Soc. 

 Veueto-Trent/ vol. ix, fasc. 2, pp. 206208. 



