1908 ENTOMOLOGICAL SOCIETY. • 69 



Nests : The nests, of robins, mice, domestic fowl, were the only ones 

 tried and from each one or more species were obtained. 



Vertebrate Animals : Several animals were killed and placed on the 

 sieve and mites were obtained from the following : young mice, mature 

 mice, robins, groundhogs, and muskrats. 



Fungi : Only a few specimens were tried. Polyporus and Boletus 

 were infested. 



Boards and Sawdust : In this case the mites were probably hiding or 

 hibernating. 



Grains : Some of the different kinds of grains that mites were obtained 

 from were: Wheat, barley, corn, oats, mangold seed; whole and ground 

 oats. 



Decaying material : Decaying squash, parsnips, potatoes, apples, beets, 

 Kohl Rabi and carrots all yielded mites. 



Hay : From Timothy and Clover hay mites were taken. 



Cones : One or two species were obtained from Pine cones. 



Miscellaneous : Litter from chicken run, grass, road scrapings, living 

 Chickweed, flowers of plants, roots of herbs, granary sweepings, decaying 

 stumps, artichoke stubble, etc. 



The aquatic apparatus is made of the same material as the terrestrial 

 one — tin and copper. It works on the same principle as the terrestrial 

 machine, that is when an arthropod becomes uncomfortable it goes up or 

 down to obtain air. The Hexapods usually go up or to the surface of the 

 water and the Arachnids go down, but instead of applying heat a few drops 

 of formalin or alcohol is added to the aquatic material. The trap consists 

 of a central bowl with a metallic sieve above and below. The material to 

 be examined is placed in the bowl and enough water is added to fill the 

 bowl to the level. When the alcohol or formalin is added the aquatic 

 larvae go up to the top of the cone and are pulled out by a little strainer. 

 The Acarids, etc., go down and are caught in a bottle below. 



This collecting trap may be taken to a pond or lake and in a short time 

 an immense amount of material can be obtained. 



