New York Agricultural Experiment Station. 483 



DESCRIPTION OF LIFE STAGES. 



Egg. — (Fig. 33, b) The eggs are white and average a trifle smaller than those of 

 niveus. The cap is narrower than in the latter species and varies greatly in length. 

 Short specimens (Fig. 33, d) measure about .4 mm. in length and breadth, while the 

 long ones (Fig. 33, c) reach .7 mm. in length, have a broad base and taper down to a 

 rather narrow tip. The projections of the cap are short and thick, measuring about 

 .011 mm. in breadth by .014 in length. (Fig. 33, e.) The end of the cap is broadly 

 rounded and the base slightly constricted. 



The average measurements of twenty specimens of eggs are as follows: length, 

 2.77 mm.; greatest width, .51 mm.; length of cap, .48 mm.; width of cap, .42 mm. 



B 



K3fsr* 



Fig. 33. — Narrow-winged Tree Cricket. 

 a, Egg punctures in apple wood (X 3); b, egg (X 15); c.d.long and short egg caps 

 (X 50); e, spicule of egg cap (X 500). 



Nymph. — First instar: Color white. Markings of head and thorax as in follow- 

 ing stage. Antennae entirely white; occasionally with a dark spot on the inner 

 edge of the first segment. Hind femora with a few black spots near distal end; hind 

 tibia? with a conspicuous black space at distal end covering about one-sixth of entire 

 length. Length 3 to 3.3 mm. Antennas 8 mm. 



Second instar: Color greenish white. Head with a short black line above and 

 back of each eye, and with black specks at the base of minute bristles between eyes and 

 antennas. Thorax with a pair of dark lines near the median line. First segment of 

 antenna with a black spot on the inner edge. Outer half of antenna very faintly 

 annulated. Hind femur with only four or five black spots on the outer side near the 

 distal end. Length 4.5 to 5 mm. 



Third instar: Dorsal area of abdomen pale green with a small median white spot 

 on hind margin and a pair of white spots near front margin. Sides pure white. Basal 

 antennal segment with the black spot on inner edge; and most specimens have a more 

 or less distinct short line on the front side near the inner edge. Second segment with 

 a small black spot on the front and inner side. Length 6 to 7 mm. 



