ACARI 559 



My discovery of metasternal shields, with one pair of 

 hairs in the deutonympha of C. Korhi, which in other res- 

 pects, viz. in regard to the configuration of the sternal, géni- 

 tal, and ventral shields agrées with C. nemorensis, for exam- 

 ple, is a conclusive proof of B. 's drawings being wrong in this 

 respect, as is also Oudemaîs's' figure of the triton y mpha 

 of C. transîmlae, in which no metasternal hairs are delineated. 



In my spécimen we notice the foUowing characteristics : Tri- 

 tosternum very long, projecting fovwards on to a level with 

 the top of the maxillary plates. Sternal shield %vith Spairs 

 of hairs, slightly concave posteriorly ; metasternal shields 

 distinct, with one pair of hairs. 



Génital shield (fig. 67) triangular top forwards, separated 

 by a narrow strip of thin cuticle from the ventral shield, 

 with net-like texture. It is extremely difïicult to make out the 

 configuration of its top, owing to its complète transparency (1). 



As far as I hâve been able to observe, it ends with a rounded, 

 radially striated, tongue-shaped lappet ; near the anterior 

 margin of this we notice, however, but to ail appearances at the 

 inner side of it, a round médian lobe, as long as it is wide at 

 the base, and set off by a pair of narrow incisions from the 

 pointed tips of two narrow plates running backwards along 

 the sides of the shield. 



One pair of hairs, the génital ones, behind the middle, and 

 not far from the sides ; one pair at the latéral angles ; and one 

 pair near the posterior margin. 



The latéral angles of the shield are contigous to the reni- 

 forn, inguinal shields, situated close behind coxse IV, and pier- 

 ced by 16 to 18 small pores. 



On the strip separating the génital from the ventral shield 

 there is one pair of hairs, and on the ventral shield 4 pairs, the 

 two médian ones of which are the longest. The anal shield 



(1) Owina; to the niite-which had obvioiisly been dead for some time before being captured-being 

 covered by détritus and fungoid niatter, I was forced to employ caustic potash to clean it. This 

 procédure, however, unfortunately resulted in its being rendered more transparent and fragile than 

 was désirable. 



J 



