48 (de. a., c. oudemans). new list of dutch acari, II. 



The species differs consequently from Uros. vegetans (Jul. Müll.) 

 1. by its fore-legs having ambulacra; 2. by its large and singular 

 mentum; 3. by its curiously crooked and irregularly swollen peritrema; 

 4. by the two rod-like hairs on the posterior end of the abdomen; 

 and 5. by the anus being with round edges (serrated in the other 

 species). These differences are possibly valuable enough to create 

 a new genus. 



60. Caeleno Beri. 



In 1836 C. L. Koch created a genus Celaeno , with Celaeno 

 spinosa as type. This animal is only a nympha of Pelops acromius 

 (Herm.), and as the genus Pelops was already created some months 

 before, the genus Celaeno C.L.Koch, 1836, is synonym to P^/öp* 

 C. L. Koch, 1836. 



The genus Celaeno contained a few very heterogene animals , 

 a. 0. Celaeno aegrota C. L. Koch, which animal became the type 

 of the genus Celaeno Grube, 1859 (Arch. f. Nat. Liv-., Esth-. u. 

 Kurl. ser. 2, v. 1 , p. 461 and 473). But the name Celaeno is 

 preoccupied by Lkach in 1822. 



Kramer proposed the name Trachynotns (Arch. f. Nat., 1876, 

 p. 74) for a genus, with Tr. pi/rijormis Kram, as type. But this 

 is the same animal as Celaeno aegrota C. L. Koch , and Traehynotus 

 was already preoccupied by Latreille in 1829. 



Trachinotus was written by Berlese in 1881 (Att. R. 1st. Ven. 

 Sc. Lett. Art., ser. 5, v. 8, p. 38); but Trachinotus was already 

 preoccupied by Cuvier in 1817. 



Finally Berlese wrote Caeleno in 1882 (ibid. p. 17 sep.) which 

 name is not preoccupied and must therefore be adopted. 



61. Rhodacarinae Oudms , nov. subfam. 



This sub-family is the nearest allied to the Epicriinae (— Zer- 

 coninae). The genital aperture of the male is situated in the sternal 

 shield and the female genital split is transverse and situated between 



