April, 1913.] Acarina of Cedar Point. 131 



A PRELIMINARY LIST OF THE ACARINA OF CEDAR POINT. 



Chas. K. Brain. 



Acarina were collected between July 20th and August 15th, 

 1912, in the vicinity of the Lake Laboratory, Cedar Point. Atten- 

 tion was paid for the greater part to those mites found along the 

 edge of the Cove, and most specimens were taken from boards 

 foimd lying at the edge of, or in the water. Most of the material 

 was mounted as collected, and some thirty slides submitted to 

 Prof. Nathan Banks who very kindly consented to make the 

 detemiinations for me. Named slides have been, deposited with 

 Prof. H. Osborn, Director of the Laboratory, and the only excuse 

 for publishing such an incomplete list is the hope that some 

 worker will continue the study of this important group in the 

 near future. 



1. Anystis agilis Banks. On fungus beetle Boletotherns bifurcus. 



2. Celsenopsis americana Banks. On Hololepta sp. 



3. Cetenopsis pedalis Banks. On larva of Passahis cornutiis Say. 



4. Cunaxa quadripilis Banks. On board at edge of Black Channel. 



5. Galumna emarginata Banks. On board at edge of Black Channel. 



6. Galumna pratensis Banks. On log N. W. of Lake Lab. 



7. Hydrachna sp. On board floating at edge of Black Channel. 



8. Hydrachna sp. Larva of. In tow-net. Black Channel. 



9. Hydrachna sp. Larva of. On ZaitJia fluminea. 



10. Hygrobates sp. On board floating at edge of Black Channel. 



IL Macrocheles sublsevis Banks. Common on fungus beetle Boletotherns 



bifurcus. 

 12. Oribatodes sp. On board floating at edge of Black Channel. 

 1.3. Oripoda sp. (probably n. sp.) On board at edge of Black Channel. 

 14. Parasitus insequalis Banks. Common on Silpha americana. 



\b. Parasitus sp. Young of. On decaying fungus. Strobilomyces strobila- 

 ceus Berk. 



16. Parasitus sp. Nymph of. Found commonly on board floating at the 



edge of Black Channel. 



17. Polyaspis lamellipes Banks. On Orthosoma britnneuin Forst. Also 



found attached to legs of Parandra hriinnca. 



18. Rhyncholophus pilosus Banks. Collected by sweeping Tilia Americana. 



19. Rhyncholophus sp. Larva of. Attached to Melanoplus bivittatus. Say. 



20. Seiulus sp. Nymph of. On cotton-wood log. 



21. Stractides .sp. in tow-net near entrance to Black Channel. 



22. Tetranychus bimaculatus Harvey. Common on plants near Lake Lab. 



dock. 



23. Trombidium sp. Larva of. On Musca domestica Linn. 



24. Tyrrellia circularis Wolcott. On board at edge of Black Channel. 

 2.5. Uropoda sp. On Hololepta sp. 



