Dec, 1910.] Matausch : Entylia Germar and its Forms. 



261 



faces of the leaves of Eiipatoriuni purpurcuni L. None was found 

 on the coarse variety of this plant known as maculatuni L., which is 

 very common in the same localities. The adult Membracids were 

 resting in two rows, the individuals alternating on each side of the 

 mid-rib of the leaf, usually with their heads directed towards the 

 apex of the leaf. The young specimens were often more irregularly 

 arranged. Each leaf seemed to be infested with a single colony, all 

 the members of which, though variable, usually presented a strong 

 family resemblance and differed more or less from the colonies 

 on other leaves. Nevertheless, there were sometimes considerable 











I 



> 



Fig. I. Entylia sinuata Fab., nymph. 



variations in form and color in the same family. The insects seem 

 to have started out on the lower leaves of the plant, which were 

 often quite brown and withered, and then to have moved to higher 

 leaves for a fresh supply of sap. Some of the plants had been seri- 

 ously injured. In some localities both the young and adult Entylia 

 were being attended by the following ants : Tapinonia sessile Say, 

 Lasiiis nigcr L. var. americanus Emery, Formica fusca L. var. 

 snhsericea Say and Mynnica brevinodis Emery var. canadensis 

 Wheeler." 



Comparing the specimens with Van Duzee's Fig. 1-6, PI. I, in 

 his studies on North American Membracidae, and the figures of 

 Entylia sinuata var. mira Butl. in the Biologia Centr. Amer., Vol. II, 

 Figs. I2-I2a^ I find that the specimens from Colebrook, Conn., 

 represent all of these forms and also the beautiful color variety 



