322 



REPORT OF STATE BOARD OF HORTICULTURE. 



The third sta<:o was found May 7, and on May 9 young of two types were 

 present in abundance. In one, the pear-shape was well develo2)ed ; in the 

 other, the form was more oblong, head and throax were larger, and distinct 

 shoulders indicated the formation of wing-pads, which could be, indeed, seen 

 very clearly in the mounted specimens. 



Here, then, is a divergence ; some of the progeny from the stem-mothers 

 tend to become like them, others are tending to the development of wingg. 

 Nothing was seen in either the first or second stage to indicate any such 

 divergence. 



Fig. 12 — Third stage of spcond series, 

 which will remain wingless; an- 

 tenna more enlarged. 



Fig. 13— Third stage of 

 second series, which 

 will become winged; 

 enlarged. 



In antennal and honey-tube structure these two forms are practically 

 alike. The feelers are five-jointed, extend to the middle of the body when 

 bent back, and have the sense pits at the end of the fourth and middle of the 

 fifth Joints. The honey tubes are equal to two body segments, are quite 

 stout, just a little narrowed at the middle, and at the tip a trifle flared or 

 enlarged. 



In the wingless form the embryos are beginning to develop, and show 

 clearly through the body wall, in the mounted specimens. In the other form. 

 nO' appearance of young could be discerned. 



Fig. 14 — Fourth stage of second 

 series, winged type, the true 

 pupa; enlarged. 



Fig. 15— Fourth stage of second 

 series, wingless type ; enlarged. 



May 10, the fourth stage of both series was found. On the one hand, there 

 isjnow a fully-developed pupa, with evident, uplifted wing-pads, distinct 



