The Ohio Naturalist, LIBRA 
V 7 NEW Y( 
PUBLISHED BY BOTANR 
The Biological Club of the Ohio State University. 
Volume IX. 
JUNE, 1909. 
No. 8. 
TABLE OF CONTENTS. 
Jackson, Mrs.—A Study of Ohio Forms of the Genus Lepidocyrtus. . 525 
Hyde—T he Reduction Division in the Anthers of Hyacinthus Orientalis. 539 
McCray—M eeting of the Biological Club. 544 
A STUDY OF OHIO FORMS OF THE GENUS LEPIDOCYRTUS.* 
Alma Drayer Jackson. 
The following paper gives the results of a study of the Ohio 
forms of the genus Lepidocyrtus, including notes on the classifi¬ 
cation, a discussion of the geographical distribution, and obser¬ 
vations on the life history. 
My studies were carried on at the Ohio State University 
under the direction of Professor Herbert Osborn, whose kind 
assistance has been greatly appreciated. Thanks should also be 
given to Professor J. W. Folsom who has read and criticised the 
paper. 
A review of the literature on the family Entomobryidae has 
shown but little work done on the genus Lepidocyrtus except in 
the description of species. For this reason a special study of 
the Ohio species has been attempted with the hope of being able 
to add some notes of interest on the life history. 
The habits of Lepidocyrtus are much the same as for other 
Collembola generally frequenting damp situations. A favorite 
locality seems to be underneath the bark of old trees, or among 
dead leaves and under stones. An exception to this is found in 
the case of L. cephalopurpureus Harvey, which was found in 
stored celery. Lepidocyrtus may be taken throughout the year, 
in winter being found deep beneath the fallen leaves. As a rule 
they are very active, and are found living either solitarv or in 
colonies. Our North American species range in size from 0.6 to 
O'. 1.5 mm. in length. 
* Contributions from the Department of Zoology and Entomology of 
1__ the Ohio State University, No. 31. 
525 
