1916 ENTOMOLOGICAL SOCIETY. 83 



circular black spot which persists in the adult though hidden by the wings. The 

 antennae are long and conspicuous, the first and second joints bearing a broad 

 band of close-set, prominent, dark-brown, clavate hairs (see fig.)- The legs are 

 slender and distinctly marked with red bands. The nymphs, when in the last 

 instar, attain a length of a quarter of an inch, and bear a pair of conspicuous wing 

 pads. Nymphs in all stages after the first moult are very much alike, though the 

 reddish mottling becomes more pronounced and darker as they grow older and 

 increase in size. 



Adult. The adult is slightly more than a quarter of an inch in length being 

 distinctly longer and narrower than the Tarnished Plant-bug {Lygus pratensis). 

 (See fig.). The general colour varies greatly both in the case of those living on 

 different hosts, where it is very marked, and also to a lesser extent among those 

 living upon the same host. The dorsal aspect of those living upon the apple varies 

 from a dull cinnamon brown with dark areas to a reddish black with light areas. 

 It has a dull felty appearance due to the presence of numerous fine light to dark 

 cinnamon hairs upon the thorax and thickened part of the wings. The sides are 

 mottled with a dull, dirty red, and ventrally the colour is a light green. The 

 antennae are longer than those of the Tarnished Plant-bug. The basal joint is 

 stout, dark in colour and densely clothed with dark brown hair, many of which in 

 fresh specimens are distinctly clavate. The second segment is slender, elongate 

 and slightly club-shaped, the distal half being dark brown and clothed with very 

 short, dark brown hairs. The legs are slender and have the same reddish banding 

 as those of the nymphs. Eef erring to this species Prof. E. P. Van Duzee states: 

 " No other Capsid known to me has thickened, clubbed hairs on an incrassate first 

 joint." 



Habits of Nymphs. 



The nymphs, when they first appear, are rather sluggish in their movements 

 and are found on the lower sides of the opened leaves, also in the unopened leaves, 

 and in those leaves which had been rolled up by the Leaf-rollers. In these rolled 

 leaves they remain at night and on cool or rainy days and in the cool part of the 

 mornings, coming out and moving around somewhat during the heat of the day 

 and feeding on the tender leaves. When the apples were about a quarter-inch in 

 diameter these were attacked, the attack continuing for about ten days till the 

 apples were a half-inch in diameter. Then the fruit was deserted and the great 

 bulk of the insects made their vr&y to the ground and soon were found feeding 

 upon practically every plant growing in the orchard. The suckers at the base of 

 the trees, red clover and curled dock were the favorite food plants. They fed also 

 upon alsike clover, Canada blue grass, rye, evening primrose, peach trees, hairy 

 vetch and timothy. 



Habits of the Adults. 



When the adults began to appear the great majority of them were found upon 

 the weeds and suckers, where they remained for about a week. At the end of this 

 time a small proportion of them appeared on the trees where they moved slowly 

 about constantly feeding upon the buds in the axils of the leaves on new growth. 

 The proportion of those on the trees to those on the weeds seemed to remain nearly 

 constant throughout the season, there always being some on the trees but never 

 very many. On and about July 19th an attack upon the aphid-stunted apples 

 took place and even a few sound Spys one and three-quarters of an inch in diameter 



