50 



MITE PARASITES. 



in nearly every hen-house, unless very clean. Some 

 considerable time ago De Geer described a Derma- 

 nyssus under the name of JJ. avium (fig. 16), which 



Fig. 16. 



Hen-Mite (Dermanyssus avium) and Ovum 

 (greatly magnified). 



I fancy to be synonymous with <jallince. This fowl- 

 mite, which is provided /with a sharp, piercing, and 

 sucking proboscis, lives in poultry-yards and in 

 pigeon-houses. 



