670 



STATE BOARD OF AGRICULTURE. 



times two placed close together. Sometimes the fringe setae are 

 doubled, there being a pair of spines instead of a single individual. Be- 

 sides these there are on the dorsal surface of each plate, three short 

 tack-like spines on the mesal border of the caudal quarter. There are 

 also four hypopygial setae. 



This species has been found on Blue-beech, Elm and Birch at Ithaca, 

 N. Y., on Blue-beach, Elm and Black willow at East Lansing, Michigan, 

 and on Peach at Covert and at South Haven, Michigan. 



It can easily be distinguished from L. cornuparvum, which it super- 

 ficially resembles by the well developed antennae, by the presence of 

 eight setae in the anal-ring and by the setae on the dorsal surfaces of 

 the anal-plates. 



Figure 6. 



Lecanium caryae. — Antenna ; and ventral 

 view of anal-plates ; f, fringe setae ; by, 

 hypopxgial setae ; sa, sub-apical setae ; a, 

 apical setae ; d, setae on dorsal surface. 



LECANIUM (Eulecamum) corni. Bouche. 



The full-grown females are yellowish-brown marked with darker when 

 just grown, later turning dark-brown and being covered with a powdery 

 or cottony material which resembles the bloom of a plum. They are 

 oval in form and in general elevated, although the size and form are 

 more variable than in any other species known to us. The full grown 

 females measure from 1/8 to 3/lG inch in length. The white eggs are 

 laid under the bodies of the mothers during May, later the eggs become 

 pinkish and hatch in late June. The young from these eggs crawl about 

 for a time on the leaves. In late August the small insects migrate back 

 to the twigs and there hibernate, completing their growth in the spring. 

 There is but one generation each year. 



The scales of tlie males are of the usual delicate, almost transparent, 

 wax with well marked ridges. 



The females, when prepared by boiling in caustic soda, show anten- 

 nae usually of seven joints, with joints three and four the longest, 

 sometimes joints three and four are united making a six-jointed an- 

 tenna. 



