116 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 
EINFLUSS DER AUSSEREN UMGEBUNG AUF DIE 
FARBUNG DER SCHMETTERLINGSPUPPEN 
(VANESSA UTRICAE) 
HEDWIG MENZEL 
Zool. Jhrb. Bd. XX XIII, Heft 2, 1913. 
Boxes were prepared in different ways so as to give a single 
color of light to the interior of each. Larve were kept in these 
boxes for some time. The data in the tables compiled from 
these experiments show that the variation in color in the pupa 
stage is caused by the influence of the different colors on the 
larve. These colors correspond to those found in nature, but 
the rate of variation in the boxes is different according to the 
color of the ight which enters. 
Larve reared in a certain color showed a decided preference 
for this when given their choice of this color and another one. 
This power of discrimination results much more because of a 
certain feeling for brightness rather than upon a qualitative 
chromatic selection. 
THE EURYPTERIDA OF NEW YORK 
CLARK AND RUEDEMAN 
Published by the New York State Department of Education, 
1912 
Of all regions of the world, the Siluric rocks are the richest 
in eurypterids. The majority of the specimens come from a 
narrow belt of territory along the Erie canal from Buffalo to 
Albany. Many of the fossils were secured from fences and old 
stone buildings where weathering had exposed them. It was 
found very difficult to get them from freshly quarried rocks, as 
even five years of exposure had little effect. 
The first eurypterid fossils to be found were supposed to be 
from some sort of fish. Their arthropod nature was deter- 
mined by De Kay in 1825. He considered them to be crus- 
taceans of the order Branchiopoda and suggested that Euryp- 
terus might be a connecting link between the ancient trilobites 
