98 



Mycologia 



pected by the collectors before its identity was known. The 

 stromata seems to be more firmly attached to the leaf than those 

 of the other species studied. It appears to occur on some kind 

 of an insect spot. 



In 1 891, Patouillard 7 called attention to the fact that Hypocrea 

 viridans Berk. & Curt, is an Aschersonia. This species was in- 

 cluded in North American Flora as a doubtful species. This 

 again emphasizes the similarity between Hypocrea (then includ- 

 ing Hypocrella) and Aschersonia. 



Since most if not all of the species of Hypocrella are entomo- 

 genous it may be that the various species of the genus will prove 

 to be of economic importance in combating harmful insects, since 

 two species of Aschersonia have already been employed in Florida 

 for this purpose. A critical study of the species of Hypocrella 

 in the tropics together with the insects which they parasitize 

 might reveal new insect enemies which could be used for this 

 purpose in our own states. This would at least furnish an in- 

 teresting field for investigation. 

 New York Botanical Garden. 



Explanation of Plate 6 



Hypocrella cretacea. — A, photograph of fern leaf with two stromata ; B, 

 diagram section of stromata showing perithecium ; C, ascus with spores ; D, 

 broken ascus with protruding spores ; E, conidia ; C-E, drawn with camera 

 lucida. 



1 Bull. Soc. Myc. Fr. 7: 48. 1891. 



