NOTES ON ACARI 



XlItJ». SERIES 

 (Parasitidae, Oribatidae, Tyroglyphidae) 



D R . A. C. OUDEMANS 



(With Plate VIII, IX aud X). 



1. Parasitus minor (Berl.). 



This form, considered by Berlese as a variety of P. longulus 

 (C. L. Koch), may be adopted as a good species, lstly, as it is 

 uuacceptable that these forms should bring forth each other and 

 2dly, as the differences are constant. These are esp. in the cf: 



P. minor (Berl.). 

 Length 470 — 480 p. 

 Epistoma middle mucro narrow 

 and shorter than lateral ones. 



Vertical hairs close to the 2d 

 pair of hairs. 



Shoulder hair a short bristle. 



P. longulus (C. L. Koch). 



Length 624 — 656 p. 



Epistoma middle mucro wide 

 and higher than lateral ones. 



Vertical hairs remote from 2d 

 pair of hairs. 



Shoulder hair a well developed 

 fiexible hair. 



Ser. I. app. 15, I, 1897 in Tijd. v. Ent 



II. 



III. 



IV. 



V. 



VI. 



VII. 



VIII. 



IX. 



X. 



XI. 



The Series are independant from one another. 



39. 

 5, X, 1900 „ „ „ v. 43. 



30, XI, 1901. Tijd. Ned. Bk. Ver., ser. 2, 

 18, VII, 1902. „ „ „ „ ser. 2, 

 14, V, 1903 Tijd. v. Ent., v. 45. 

 28, VII, 1903. „ „ „ v. 46. 



31, X, 1902. Tijd. Ned. Bk. Ver. ser. 2, v 

 10, XII, 1903 „ „ „ „ „ 2, v 



1904. Abh. Nat. Ver. Bremen. 

 1904. Métn. Soc. Zool. Trance, v. 

 13, I, 1904. Tijdschr. v. Entom., v. 46. 



