PROCEEDINGS, 1917 8T 



readily distinguished from the very few hibernated adults that still remained by their 

 fresh coloring. By the end of three weeks practically all the remaining nymphs had 

 reached the adult stage and eventually the sorrel was completely abandoned. 



DESCRIPTION OF LIFE STAGES. 



Egg. The egg is long and cylindrical, very slightly swollen at the centre; curved 

 somewhat at one side; base broadly rounded; apex broad and flattened above a slightly 

 constricted neck. Chorion, smooth; delicate translucent. Cap, coarsely punctured; 

 faintly yellow. General Color, pale yellowish white; translucent. Length .947 mm. to 1.0 

 mm.; width .22mm. to .245 mm. 



Nymph. The nymphs are very similar in form and all are green in color; the first 

 two are a plain rather yellowish green and the others have increasingly pronounced 

 dusky and reddish markings. All stages are very active and will drop readily upon the 

 slightest disturbance. 



First Instar. Body very small and narrow; lateral margins narrowest at caudal 

 margin of prothorax, very slightly wider at base of abdomen, thence widening abruptly 

 to third abdominal segment and tapering more gradually to caudal extremity. Read, 

 triangular; broadly rounded in front; a deep median longitudinal suture extends from 

 the base cephalad, two thirds of the length. Prothorax, one half of the length of the 

 head, of equal width. Mesothorax, 1-6 longer than prothorax, very slightly wider. Me- 

 tathorax, half the length of mesothorax, equal in width. Abdomen, pyriform, slightly 

 marginate. Entire dorsal surface of body clothed with few short, stout dark hairs, 

 regularly placed, and a fine whitish pubescence. The dark body hairs are three or four 

 branched at the tip. Antennae, long, thick, pubescent; terminal segment rather swol- 

 len in middle, clothed with coarser hairs. Length 1.0 mm. to 1.2mm., the segments as 

 follows: — 1. .10 mm. to .12 mm. II. .24mm. to .26mm.; III. .225mm. to .24mm.; IV. 

 .43 mm. to .452 mm. Legs, long, slender, clothed with f ne hairs on tibiae and tarsi; few 

 stout hairs on femora. Length of hind tibia, .48mm. to .52 mm. Rostrum, very long, 

 reaching to a point two-thirds the length o r abdomen from its base. Color, greenish yel- 

 low; head dark shining yellow; thorax slightly dusky with median longitudinal line 

 of yellow; abdomen rather more greenish, with an orange spot on middle of the caudal 

 margin of the third abdominal segment. Eyes dark red. Legs pale yellowish, slightly 

 dusky; proximal end of tibiae dark red; tarsi dusky at tip. Antennae concolorous with 

 legs, last segment tinged with dull red. Length of body', 1.0 to 1.1 mm.; width of head at 

 eyes .34 mm. to .36 mm. 



Second Instar. Body, broader and stouter than preceding stage, but otherwise 

 similar in form. Head, lacking the median longitudinal suture. Thorax, broadening 

 caudally; prothorax, equal in width to head including eyes, slightly shorter; mesothorax, 

 one-fifth wider than prothorax, one-half the length; metathcrax, one-seventh wider than 

 mesothorax and equal in length. Abdomen, broad, rounded, marginate, pyriform. Legs 

 and antennae, shorter than in preceding stage, by comparison with body. Length of 

 antennae, 1.38 mm. to 1.5 mm. 1. .175 mm. to .180 mm.; II. .38 mm. to .428 mm. III. 

 .32mm. to .37 mm.; IV. .50mm. to .55mm. Length of hind tibia, .712 mm. to .73 mm. 

 Color, entire body bright pea-green color, with a tinge of yellow at caudal margins of 

 thorax. Bright orange-yellow spot on third adbominal segment, with a slightly smaller 

 spot at posterior margin. Legs, greyish white, very faintly banded twice on each femur 

 with reddish brown; proximal tip of tibiae red brown; tarsi dusky. Eyes dark red. An- 

 tennae with same coloring as before. Length of body 1.58 mm. to 1.65 mm; width of 

 head at eyes, .45 mm. to .52mm. 



Third Instar. Larger, broader and thicker body; lateral margins narrowest be- 

 hind eyes. Head, triangular, strongly rounded at apex. Prothorax, short; broad; pos- 



