[65] Report of the State Entomologist. 161 



Perhaps, in this instance, they had been feeding upon the minute 

 Psoci and other small insect forms that are usually found in the cre- 

 vices and between the overlapping siding of wooden dwellings during 



the spring months. 



Bemedies. 



"We ai-e unable to give the result of any experiments made in 

 destroying these mites in an infested dwelling, but from what is known 

 of their nature, we would suggest the following as effective and simple 

 remedies: 1. Flour of sulphur, distributed with a powder bellows. 

 2. Fresh pyrethrum powder, apj)lied in the same manner, or in liquid 

 form with a sj)raying apparatus. The Woodason bellows and 

 atomizers, made at 451 Cambria street, Philadelphia, are excellent for 

 these uses. 3. Kerosene, but preferably benzine, applied with an 

 atomizer. In using the latter, air the room thoroughly before lights 

 are introduced. 4. Fumigate, by burning brimstone in a metal vessel 

 floating in a tub of water (to prevent setting fire to the room), the 

 room being first tightly closed and so kept for several hours. This 

 remedy may be resorted to where the entire apartment, walls, ceiling 

 and floor are swarming with the mites. 



Note. 

 From a notice in Insect Life, ii, 1890, pp. 278-9, which appeared since 

 the above was presented for publication, of a mite infesting a house 

 in Wilmington, Ohio, after the same manner as recorded from the 

 other Ohio localities, and which was determined by the Division of 

 Entomology at Washington as Bryohia j^ratensis, it seems quite prob- 

 able that all these instances above noticed may be referred to the 

 same species — entering houses for hibernation or breeding, and 

 occurring and feeding on clover and grasses out of doors. 



n 



