62 
PSYCHE 
[June-August 
ous larv'86. Under so-called normal conditions, then, climate would noticeably 
influence the length of the instars. 
1. External develop}?ient. Five (5) eggs deposited during the evening 
22nd June, showed no external changes until the morning of June 
24th, when they were shaded by the yolk mass. At 8 M., 25th 
June, the embryo was plainly visible, showing buds of the appendages, 
the body segments, and the reddish eyes. On morning of 28th June 
they hatched without further changes. 
2. Length of instar. Two observations made on a total number of thirty 
(30) eggs during the last two weeks in June averaged 5 days, 12 hours. 
Eggs confined indoors. 
3. Number deposited. See adults. 
N^ymph. 
1. Description of stages. 
I. Length, 1.45 mm. Whole body pale, sordid yellowish-white, much 
paler at exclusion; eyes bright red; a dark, transverse, sub-arcuate 
dash on dorsum of caudal abdomen, sometimes confused; head and 
portions of thorax darker, subfuscous. Deep red after feeding. .\n- 
tennoe 4-jointed. From many specimens, 12 hours after exclusion. 
II. Length, 2.10 mm., variable. The same; sordid yellow, discus of 
abdomen dark from food; eyes darker; abdomen flat, depressed, 
wider than in I. 
III. Length, 2.50 mm., variable. The same; uniformly luteus, the discus 
of abdomen darker from food, its margins lighter; eyes dark; abdomen 
oval (dorsal aspect), depressed, much wider. E.xuvium entire, sordid 
white. 
IV. Length, 3.00 mm., variable. The same; body slightly darker. 
V. Length, 3.80 mm., variable. The same; body entirely fuscous. 
Description from 3 specimens, made immediately after ecdysis. 
2. Development. 
A. A single nymph or larva hatching during the morning of June 24th and 
