NOV., '09] KXTOMOl.OCICAL XK\VS 373 



Notes on the American Oribatid Fauna, with a 



List of Four Species of European Oribatidae 



Hitherto Unknown in This Country. 



BY H. E. EWING, Urbana, 111. 



The oribatid fauna of North America in general appears 

 to be distinct from that of Europe. Mr. Banks in his cata- 

 logue of the Acarina of the United States (Proc. U. S. Nat. 

 Mus. Vol. XXXII, pp. 595-625) gives a list of eighty-four 

 species known in this country and according to this author 

 they are all peculiar to America. In the course of about three 

 years collecting, being assisted by several other persons, I 

 have found four species in this country which I give here 

 below that are well known European forms, one of which is 

 remarkable in being saltatorial. 



Notaspis bipilis Herm., Mem. apt., p. 95. 



In moss. Collected by L. M. Smith at Parker, 111., and by 

 the writer at Arcola, 111. Several specimens. 



Zetorchestes micronychns (Berl. and Can.), Berl. Acar. Myr. Scor. 

 fasc. 4. 



In trash. Collected by means of a Berlese funnel by C. R. 

 Crosby at Columbia, Mo. 



Hermannia bistriata (Nic. ) Arch. Mus. Paris, Vol. vii, p. 397. 



Under logs, in moss and in trash. Collected by C. R. Crosby 

 at Columbia, Mo., by J. Douglass Hood at Urbana, 111., and by 

 the writer at Arcola, 111. 



Tegeocranus velatus Michael, Jour. Royal Mic. Soc., Vol. iii, p. 189 

 In moss. Collected by the writer at Muncie, 111. 

 The first of these species, Notaspis bipilis Herm., is closely 

 related to Oppia spinipcs Banks and Oppia inoiitana Hanks, 

 but the author has compared the specimens with a named 

 specimen sent him by Mr. A. D. Michael and finds that they 

 agree in every respect with A r . bipilis Herm. This species has 

 a wide distribution having been found before now in many 

 places in Europe, in Siberia and in the arctics. Its habitat is 

 exclusively in moss. 



