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 
found 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 
determinations 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 Boletotherus bifurcus. 
2. Celaenopsis americana Banks. On Iiololepta sp. 
3. Celaenopsis pedalis Banks. On larva of Passalus cornutus 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 Zaitha jiuminea. 
10. Hygrobates sp. On board floating at edge of Black Channel. 
11. Macrocheles sublaevis Banks. Common on fungus beetle Boletotherus 
bifurcus. 
12. Oribatodes sp. On board floating at edge of Black Channel. 
13. Oripoda sp. (probably n. sp.) On board at edge of Black Channel. 
14. Parasitus inaequalis Banks. Common on Silpha americana. 
15. Parasitus sp. Young of. On decaying fungus. Strobilomyces slrobila- 
ceus Berk. 
16. Parasitus sp. Nymph of. Found commonly on board floating at the 
edge of Black Channel. 
17. Polyaspis lamellipes Banks. On Orthosoma brunneum Forst. Also 
found attached to legs of Parandra brunnea. 
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. 
25. Uropoda sp. On Iiololepta sp. 
