268 (or. a. c. oudemans) list of dutch acari. 



Derniatori/Mes IIei.ler , 1880, Schmarotzer des Thierr. 



25. Psoroptes Gervais, 4841, in Ann. Sc. Nat, (2) 15. p. 9. 

 Type Acarus equi Raspail, 1831 = Acariis exulcerans Linné, no 

 doubt, if we compare Linné's description with ihe animal , known 

 as Psoroptes equi. 



Synonyms : 



Dermatodecies Gerlach , 1857, Krätze und Räude p. 29. 

 Dermatoho'ptes Fürstenberg, 1861, Krätzm. p. 219. 

 Dermatocoptes , Zürn, Ueber Milben, 1877. 



26. Chorioptes Gervais, 1859, in Gerv. et Van Ren. Zool. 

 méd. I, p. 463. Synonyms: 



Si/mbiotes Gerlach, 1857, Krätze und Räude, p. 30 , but Syw«- 

 biotes was already used by Redtenbacher , 1847?, for Coleoptera 

 Eìidomychìàae. Type Symhiotes equi. 



Chiroptes Fürstenberg, 1861. Krätzm. p. 209, 222. 



Bermatophagus FQrstenberg, 1861, Krätzm. p. 217. 



Sarcodermatodecfes Delafond et Bourgignon, 1862, in Mém. 

 Sav. Etrang. 16. 1. p. 293. 



Symhiotus Fümouze et Robin, 1868, in .lourn. Anat. Phys. 

 n''. 3 , July. 



27. B er matophag aides. — Bogdanoff has delineated and described 

 a species of mite under the name of Dermatophagoides Schereme- 

 teioshji (Bull. Soc. Nat. Mose. 1864. p. 341 sqq.) Mégnin has 

 considered it the same as his Chorioptes ecaudatns. I think Mégnin 

 was wrong in doing so. It is ti'ue that in general aspect the 

 two species may agree, but the details they are so different, that 

 nearly no two of them ai-e identical. We have only to compare 

 the figures to come to this conclusions. It is here not the 

 place to state this point for point. I will do so most probably 

 ere long 



In 1879 I made a preparation of the contents of a sebaceous 

 gland of my own face, with some Bemodex foUiculorum in gly- 

 cerine. Three years afterwards I saw , but very indistinctly, in the 

 same preparation lying quite within the fat globules another 

 mite, which I have now separated, and which though it is iK)t 



