New York Agricultural Experiment Station. 489 



DESCRIPTION OF LIFE STAGES. 



Egg. — The eggs (Fig. 34, c) are of a light or medium yellow color, and brightest 

 when first laid. The cap is smaller than that of niveus, broader than long and hemis- 

 pherical, the sides being parallel only at the extreme base. (Fig. 34, e.) The color of 



the cap is dull white but is sometimes 

 stained reddish when in certain plants. 

 The projections are short, cylindrical, 

 and rounded at the tips. (Fig. 34, d.) 

 Those near the end of the cap are .012 

 mm. long by .008 mm. in diameter. The 

 eggs are more uniform in size than those 

 of niveus and are generally narrower. 

 Average measurements of thirty-six 

 specimens are as follows: Length 2.9 

 mm.; greatest width .57 mm.; length of 

 cap .33 mm.; width of cap .44 mm. 



Nymph. — First instar: Color, pale 

 slightly greenish yellow. A slight infusca- 

 tion extends along the dorsal side from 

 the antennae back, and is divided along 

 entire length by a narrow pale median 

 line. Just back of the antennae the 

 median line meets a pale transverse 

 curved line which arches posteriorly. 

 On the abdomen the shaded area is 

 bounded on each side by a pale line 

 which is in turn bordered by a faint 

 dark line. The antennae are gray all over 

 but darkest toward the extremity. 

 Length 3 mm. Antennae 6 to 6.8 mm. 

 Second instar: Pale greenish yellow 

 with scattered whitish flakes. Pale 

 dorsal median line present, dorsal infusca- 

 tion very faint. The two basal antennal 

 segments are pale in color and the first 

 segment has a dark longitudinal streak 

 on the inner edge of the front Bide. 

 Length 4 to 5 mm. 



Third instar: Yellowish green, mottled 

 with small whitish spots and with a pale 

 median line. Legs speckled with fine 

 dark spots at bases of hairs. Markings 

 of basal antennal segments of the same 

 pattern as in adult, but faint. Length 6 

 to 7 mm. 



Fourth instar: Antennal markings 

 distinct. Slight infuscation on head 

 and pronotum, bordering the median 

 pale line. Length 8.5 to 10 mm. 



Fifth instar: Dorsal part of head 

 slightly brownish. Hairs on body mostly dark. Legs appear rather dark, due to 

 numerous dark hairs and spots. The spots on the basal antennal segments are 

 large and conspicuous but not confluent. Ventral side of abdomen slightly infus- 

 cated and covered with small brownish spots. Length 11 to 12.5 mm. 



Adult. — The amount of color in this species varies considerably and newly moulted 

 specimens are fighter than old ones. The light specimens are greenish yellow. Head 

 with blackish or sepia shading on median area, sides and front below the antenna;. 



■FZ*? 



Fig. 34. — Steiped Tree Cricket. 

 a, Egg punctures in raspberry (X 1§); 

 b, longitudinal section of the same 

 (X 3); c, egg (X 15); d, spicule of 

 egg cap (X 500); e, egg cap (X50). 



