Observations on Some Entomophihorecz. 177 



have fallen on such leaf and been devoured, or brought in 

 contact with the body of a healthy caterpillar by the latter 

 crawling over and among them. As it is quite improbable 

 that the spores would winter over, and remain for a year on 

 the fences, the disease must have been first conveyed to the 

 fences by affected larvae from the adjoining vegetation. 



That the hypha of 'germination, after it has entered the 

 body of the host, develops with some rapidity is admitted by 

 all, and I had what appeared to be a good illustration in 

 August, 1 891, at Columbus, Ohio. This time the host was 

 Diedrocephabis mollipes, and the Empiisa possibly E. jassi 

 Cohn. A very small plat of wheat plants were grown in the 

 orchard of the Agricultural Experiment Station, which plat 

 being fully one hundred feet from any grass or similar 

 herbage. For a considerable time I found regularly every 

 day or two, one, and rarely two victims rigidly fixed to the 

 leaves of the plants, with wings outstretched in all cases. 

 The plat covered little more than a couple of square feet area, 

 and it was easy to watch the number of visitants, which 

 seldom numbered more than two or three at the same time. 

 In fact, it had the look of a veritable death-trap, to which one 

 victim after another was allured, became infected and died. 

 This fatality was doubtless aggravated by the drouth, which 

 was very severe at the time, while the wheat plants were 

 kept fresh and vigorous by frequent watering. No amount 

 of search in the vicinity indicated any such ravages else- 

 where. 



In the foregoing I have used the generic name Evipusa, but 

 not without serious doubts as to its' validity. This name is 

 also used for a genus in Orthop/era, a large pale-green mantis, 

 common in the countries bordering the Mediterranean Sea, be- 

 ing known as Empusa paiiperata Fabr. The use of this name 

 generically, in entomology, has priority over its use in desig- 

 nating a genus of Eutomophthorese; besides, to continue to 

 use it in the latter connection might precipitate a complica- 

 tion, as in this country, at least, Empusa is known to affect 

 several Orthoptcra. 



