5°4 
The Ohio Naturalist. 
[Vol. XV, No. 7, 
As the nymph emerges, the chorion is split longitudinally, the 
rupture extending a little over one-half of its length to well over 
the larger end. About fifty days after hatching the adult stage 
is reached, five ecdyses having taken place. So far as our obser¬ 
vations have gone, it seems to be distinctly a lacustrine species, 
and found almost entirely in the apterous form. They are very 
active little creatures and congregate in immense numbers near 
• the shore in sheltered places. They are predaceous. Their food 
Fig. 1. 9 Limnogonus hesione Kirk. 
(From drawing by J. D. Smith.) 
consists of small insects that fall into the water. In case there 
there are no living victims, they do not disdain food that has been 
dead for some time, and are often seen feeding on decaying in¬ 
sects. (Id. by Mr. J. R. de la Torre Bueno.) 
Metrobates hesperius Uhler. 
Immense numbers, taken at Berea, at Olmsted Falls, and at 
Columbus by the junior writer. 
Mesovelia mulsanti F. B. White. 
One nymph, taken at Sandusky by the senior writer. 
