(üR. A. C. OUDBMANS) LIST OF DUTCH ACAllI. 121 



40. Cheyleius JS'oemeri Poppe. — Ia tlie spools of the reiniges 

 and recli'ices of Slerim hlrmido , Sneek , Apr. 



M y o b i a von Heyd. 1826. 



41. Mi/ohla nmscidi Schrank. — On Mus musaidiis , Sneek, 

 Jan., Mrch. , Apr., May, June, July, Dec; Leiden, Jan. 



42. Mì/ohla hrevìhamata Haller. — On Talpa europaea , Sneek, 

 Apr. , Dec. 



43. Myohia lemnina Kocn. — On Mus sßvaücus , Haarlenri, 8. 



44. Myohïa aßms Poppe. — On Mus muscnlus, Sneek, Jan., 

 Mrch., Apr., June, July, Dec; Leiden, Jan. 



45. Myohïa ensïfera Poppe. — On Mus decimuuMS, Sneek, 

 Jan. , Dec. Arnhem , June. 



46. Mìjohìa Claparèdel Poppe. — On Sorex vul/jaris , Sneek , Dec. 



47. Myobia elongata Poppe. — On Sorex vulgaris, Sneek, Dec. 



48. Myohïa sp. — On Crossopus /odiens, Sneek. 



Pi cobi a Haller 1878. 



49. Ficohia bipectinaia Heller , forma minor. — On Troglo- 

 dytes troglodytes L. Utrecht, 6. 



Psorergates Tyrr! 1883. 



50. Psorergates simplex Tyrr. — In subcutaneous mines 

 on the inner surface of the ears and in a sebaceous pimple on 

 the lip of Mus musculus L. — Utrecht, 6; Sneek, 1, 3, 7. 



Rema r k s. 



1. — Tromhldldes. — This name was given by Leach in 1814 

 to a group of Acari, containing the genera Trombidiwm Fabr., 

 Ocypete Leach, and Erythraeus Latr. — The genus Tromhidium 

 was afterwards divided into several genera , and several new genera 

 weie discovered , but although the group was enlarged , its cha- 

 racter remained the same. I abstain from using the terms tribe, 

 subtribe, family, subfamily, order or suborder, for there are no 

 orders, families and tribes in nature, there are only natural groups. 

 "What was called a genus in the days of Linné, is a family. 



