382 Illinois State Laboratory of Natural History. 



SCHIZOCERCA DADAY. 



Foot long, ending in a fork of two unequal branches, each 

 terminated by a pair of unequal toes. 



97. S. diversicornis Daday. 



This species did not make its appearance in our collections 

 until 1895, and then it was quite rare. It was well dis- 

 tributed, however, being taken in towings from the Illinois 

 River and from the three more permanent lakes. It occurred 

 from July to September. 



98. S. diversicornis homoceros Wierz. ('91). 



Not so abundant as the preceding, being found but twice; 

 once in Phelps Lake in June, 1894, and again in Thompson's 

 Lake in August, 1895 ; on both occasions in the towings. 



NOTEUS Ehrbg. 

 Lorica faceted, and covered with raised points; gibbous 

 dorsally, flat ventrally; foot obscurely jointed; toes moder- 

 ately long ; eyes wanting. 



99. N. quadricornis Ehrbg. 



This beautiful creature was found many times in the tow- 

 ings or among vegetation, but it was never abundant. It is 

 evidently a summer species as it was present only from May 

 to November. Found in the Illinois River and in the three 

 deeper lakes. 



Family ANUR^EID-ffi. 



ANTJRiEA GOSSE. 



Lorica an oblong box, open widely in front, narrowly in 

 rear ; dorsal surface usually tessellated ; spines present ; the 

 egg, after extrusion, carried attached to the lorica. 



100. A. hypelasma Gosse. 



This species was found only in towings from Thompson's 

 Lake and among vegetation in Quiver Lake, in July, 1895. 



101. A. tecta Gosse. 



This species was present very uniformly throughout the 

 year, but was not at any time common. It was found in the 

 river and in all of the lakes except Flag Lake. 



