458 NEW YORK STATE MUSEUM 



The fruit-grower will need no further detail of the appearance of the 

 mite to serve for its recognition, than has already been given. The 



Fig. 22.— Tne pear-tree blister-mite, Phytoptus pyri, largely magnified; and a leaf showing 

 the blister galls, natural size. 



entomological student, in the absence of Dr. Nalepa's paper, may be 

 glad to have the following abridgment of Dr. Nalepa's description, as 

 given by Miss Ormerod, in her 17th Report: 



Body cylindrical, 0.2 mm. long, about 5-6 times as long as broad. 

 Thoracic shield very small, semicircular. * * * The proboscis is 

 strong, slightly curved, directed forward, and 0.025 mm. long. The 

 legs are rather weak and short. The holding-claw (" haftklaue ") is 

 very small, exceedingly slender, and four-branched. (This is some- 

 times described as a "feather-bristle.") * * * The abdomen is 

 uniformly ringed (about eight rings), and rather finely punctured. 



Remedies. 



Most of the mites can be destroyed by applications of sulphur in 

 some form, as the simple flour of sulphur thrown upon the foliage 

 when wet with dew; sulphur, soap, and water mixed; combined with 

 an alkali in the proportion of one pound of sulphur and two pounds of 

 fresh lime boiled in four gallons of water; or, four ounces of sulphuret 

 of lime, purchased at the druggist's, and two ounces of soft soap, 



