(dr. a. c. oudemans). list or dutch acari 245 



19. Fiona sp. — Sneek, May, June. 



20. Fiona sp. — Sneek , May. 



21. Fiona sp. — Sneek, May. 



22. Fiona sp, — Sneek , May. 



23. Fiona sp. — Sneek , July. 



G u r V i p e s Koenike 1891. 



24. Curvipes rosea Kocii , Sneek , May. 



25. Curvipes sp. (related to rosea), Sneek , May. 



26. Curvipes sp. — Sneek , May. 



27. Curvipes sp. — Sneek , April. 



28. Curvipes decorata Neum. — Sneek, May; Scharsterbrup, June; 

 Patria, Dr. Everts. 



U n i n i c o 1 a Hald. 1 842. 



29. Unionicola crassipes Müll. — Patria, Dr. Everts. 



30. Unionicola sp. — Delden, April. 



Remarks. 



1. Ihjdrachnellae. — The oldest denomination of the group 

 generally called Kydrachiulae is that of Latreille, who in 1802 

 called it Hydrachnellae (Hist. Nat. des Ins. Ill) , he also used this 

 term in 1806 in his «Considérations générales, etc.» and in his 

 «Genera Grustaceorum et Insectorum », like Forel in Bull. Soc. 

 Vaud. Sc. Nat. XIV, p. 233, 1876. — 



Leach called the same group Uijdrachddes (Trans. Linn. Soc. 

 1814'), and so did Bruzelius in his Beschriv. Hydr. 1854, Sun- 

 DEVAL in 1833 in his Gonspectus Arachnidum , Nicolet in 1855 

 in Arch. Mus. Par. VII, p. 383 and Neuman in 1880 in Kong. 

 Sv. Vet, Akad. Handl. 17. 3. p. 16. — Further synonyms are: 



Hydrachnadae , Leach, 1817 in Sam. Gomp. 



Anastomata Lamarck, 1819, in his Hist, des Anim. s. Vert. 

 V. p. 84. 



Hydrachnei Duces, 1834, in Ann. Sc. Nat. (2),i, p, 16,144. 



Hydrachnae, Walckenaer , 1837, in Walck. ct Gerv. Apt. I. 

 p. 40; Gervais in idem Hi. p. 134. 



