12 Psyche [February 
July 2—first molt (about 3 days old). 
‘* 13—third molt (second not seen). — 
** 21—transformed to pupa. 
** 23—adult female. 
This makes the complete cycle occupy about twenty-four days, 
in midsummer in Ithaca. This specimen was taken from a spring- 
fed pool, was transferred to the laboratory and raised in a procelain 
dish in the water of the Cornell campus reservoir. Its food was 
Spirogyra, Zygnema, and Mougeotia, with Cladophora for brows- 
ing and to furnish surface particles. The adult which emerged 
was no smaller than many that have come from pupe taken at 
the same pool. The only special care given was to prevent the 
afternoon sun from shining upon it, and to add fresh water fre- 
quently. 
Some of the Records of Developing Larve. 
A. July 26—hatched .825 mm. long. 
27—10.30 a. mM. 1. mm. 
Q27—3 P. M. No change, head broad. 
28—10.30 a. mM. Collar wider, head dark, 1.55, mm. 
29—11.30 a.m. 1.55 mm., collar still larger, 3 days 
old, not molted. (Died.) 
hatched 825 mm. 4 hrs. old when meas- 
ured. ; 
27—head large 1.05 mm. 18 hrs. old, 10.30 a. M. 
27—head large 1.17 mm. (About) 24 hrs. old, 
B. July 26 
7 
245 P. M. 
28—head narrower, collar wide, thorax more distinct 
10.30 A. M. 
*  29— 1.5 mm., 3d day 10.30 A. M. 
< 30— 1.5 mm., 4th day molted. (Died.) 
10.30 A. M. 
C. July 25—had molted once 1.5 mm. 9 A. M- 
29—second molt, about 43 days between Ist and 2d 
molt. 
30—no palmate hairs, single eye spots, no antennal 
buds. 
31—large eye beginning to show, 10 days. 
