﻿158 New York State College of Forestry 



of the thorax along with the antennae. The skin breaks along the 

 mid-dorsal line from the head to about the center of the abdomen. 

 The body within is bowed upward and the prothorax is the first 

 part seen to come through the slit, later the head is withdrawn. 

 The legs are packed close together and by an up and down motion 

 of these, much like a pumping action, the nympli climbs out of its 

 old skin which remains standing, 



A specimen was timed during the fourth moult, as follows : The 

 skin split about 9 : 4-1 a. m. At 9 : 51 the proboscis and one antenna 

 had been withdraAvn ; soon after that the other antenna ; next a 

 front leg was worked free and gradually all of them, and the 

 nymph stood quietly bracing himself, his abdomen still attached 

 to the moult-skin. This he finally separated himself from by push- 

 ing against it with his hind feet. At 9 : 58 a. m. the process was 

 completed, just fourteen minutes after the dorsal split occurred. 



Directly after moulting the movements of the head and legs 

 w^ere very feeble. At this time in the earlier instars the nymphs 

 were nearly colorless except for red spots on the femora, antennae, 

 and the reddish eyes. In the later instars, the first appearance 

 after moulting was a dead-white, red spots appearing on the first 

 and second antennal joints, on the head and also at the apical ends 

 of the femora. The eyes have a reddish-brown appearance and the 

 coxae are transparent and glass-like. 



The spots first appearing red, usually turn black after a short 

 time. One exception to this is the apical spot of the femora which 

 sometimes remains a reddish-brown. 



The nymph is not in its new covering long before it hardens and 

 begins to color. That this pigment is merely in the outer skin is 

 shown by a study of the old moult-skin, and that it is produced by 

 cells underlying it is shown by the absence of color in the newly 

 acquired skin. 



The Adult 



N. roseipennis is found in both the long-winged and short -winged 

 form. Length of adult male about 5.9 mm.; widest part of pro- 

 thorax 1.4 mm. ; widest part of abdomen 1.9 mm. ; color red-brown 

 with dusky markings; general shape elongate-oval; female about 

 7.1 mm. long; widest part of prothorax 1.6 mm.; widest part of 

 abdomen 2.3 mm. ; female wider proportionally through abdomen 

 than male, and with darker markings; antennae not quite as long 

 as body, second joint dark at apical end and the two distal joints 

 dark; eyes large, dark red and bulging; tylus dark along sides; 

 dusky converging lines on head with dark, narrow area between 

 them hairy, a large ocellus at the posterior end of each dark line ; 

 sides of head dusky and pubescent ; wings light tan in color, pubes- 

 cent and dusky-spotted ; one unbranched vein through clavus ; two 

 long veins in corium, inner one dividing near posterior end of 

 commissure and uniting again, forming a diamond-shaped cell, the 

 vein then extending along the posterior border of the corium 



