116 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



EINFLUSS DER AUSSEREN UMGEBUNG AUF DIE 



FARBUNG DER SCHMETTERLINGSPUPPEN 



{VANESSA UTRICAE) 



HEDWIG MENZEL 



Zool. Jhrb. Bd. XXXIII, Heft 2, 1913. 



Boxes were prepared in different ways so as to give a single 

 color of light to the interior of each. Larva? were kept in these 

 boxes for some time. The data in the tables comi)iled from 

 these experiments show that the variation in color in the pupa 

 stage is caused by the influence of the different colors on the 

 larvse. These colors correspond to those found in nature, but 

 the rate of variation in the boxes is different according to the 

 color of the light which enters. 



Larvae reared in a certain color showed a decided preference 

 for this when given their choice of this color and another one. 

 This poM'er of discrimination results much more because of a 

 certain feeling for brightness rather than upon a (lualitative 

 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 l^elt 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 



