June, i9ir] DiCKERsoN : Leptobyrsa rhododendri. 109 



of Tingids have been observed in copulation. These individuals rest 

 side by side, the bodies forming an angle of about 95 degrees and 

 the abdomen of the female dorsal to that of the male. From these 

 eggs a second brood of adults emerges in August. Nymphs of this 

 brood have been observed at Springfield, N. J., August 23, nymphs 

 in all stages and adults at Somerville, N. J., August 21, and in Cum- 

 berland County, N. J., September 2. Adults in small numbers were 

 still present on badly infested plants in the northern part of the state 

 on September 29. Adults of this brood oviposit the hibernating eggs. 



On the other hand I have observed near Newark, N. J., infested 

 plants where there was only one brood. Adults began to mature in 

 early June and continued to appear until shortly after the middle of 

 that month and continued in evidence through July; no hatching of 

 eggs occurred in August and hence there was only one complete 

 brood. 



In this connection it is interesting to note what Mr. Van den 

 Broek and P. J. Schenk say concerning the insect in Holland 

 (Zeitken en Beschadigingen der Tuimbouwgewassen, p. 170), 

 Stcphanitis (Tiiigis) rhododendri. Insects pass the winter in egg 

 stage. In May or later the eggs hatch and it takes about three weeks 

 to complete its development. Not all the eggs hatch at one time 

 apparently, as nymphs are still found at the end of July and in the 

 beginning of August. The insects disappear at the end of summer. 



An examination of the adults reveals some interesting structures 

 including those associated with the reproductive system. 



In the male the extremity of the body appears somewhat elongate 

 due to the character of the apical segment. This is narrower and 

 longer than the other abdominal segments and normally rests with its 

 base somewhat retracted within the penultimate one. It may also be 

 designated as the genital segment since it bears the reproductive 

 organs. On the dorsal side (Plate VIII, fig. i) there is a concave 

 posterior margin just before which, laterally, is noted a slight cov- 

 ering of short hairs. From beneath this margin there projects a 

 pair — one on each side — of comparatively large falcate claspers which 

 are sparingly covered with hair at center, especially on the inner 

 side. Between these claspers and also projecting from beneath the 

 central part of the margin is the penis, resting within a thin chitinous 

 sheath, which is elongate and truncate with parallel sides and bears 



