136 Journal of Entomology and Zoology 
which the young may be identified by the color pattern and color. 
There have been few sources from which any material upon this 
subject could be found. Comstock in his ‘Spider Book’’ makes no 
note of the color changes, but McCook makes the following ob- 
servations: ‘‘With each moult spiders undergo a change in color 
and patterns more or less decided; but some undergo such decided 
changes that different species have been established for the same 
spider upon specimens taken after different moulting periods. In 
some species the color and markings of the younglings, after the 
first moult or two, fairly represent the markings of the adult at 
maturity; in others the difference is so great between the two stages 
of life that it is quite impossible to identify young individuals or 
distinguish the young of several species with accuracy.” 
The female colors predominate through all the young, the im- 
mature males in the most cases taking the colors and markings of 
the female until the last moult, when they then take on the mark- 
ings and characteristics of the adult male. 
In the following pages of the paper there will be found a de- . 
scription of the different stages of the spiderling of different species, 
especially in reference to the different color stages... The dorsal 
side of the spider has the color pattern, therefore it will be the 
surface which is always described. 
Peucetia viridans Hentz. Plates I, II and III 
The color markings of the adult female were very brilliant and 
beautiful. The eye space is black, the cephalic part of the cephalo- 
thorax is light yellow with red and brown markings, the thoracic 
region is a dark green ground color with two red lines running down 
and around the sides of it. There is a median brown line extending 
from the eye space to the lower edge of the cephalothorax. The 
abdomen has a dark brown ground color with four white spots, the 
lower two of which are edged with red. On the upper half of the 
abdomen are two orange stripes flecked with red and separated by 
a light green stripe with a darker one in its center. The lower 
half of the abdomen has two light green and two yellow green 
stripes on either side of the median line. There are numerous 
flecks of red all over the dark green on the abdomen. The spin- 
