358 
The Ohio Naturalist. 
[Vol. VIII, No. 7, 
Male. Body, length 1.70 mm., width .70 mm.; head, length 
.59 mm., width .57 mm. Considerably smaller than female,color¬ 
ation much'the same. Last segment of abdomen rounded and 
clear; genitalia showing quite prominently. 
This form bears some resemblance to D. cursor Nitzsch, but 
differs in size and in various other characters. 
Many specimens taken from Syrnium nebulosum at Colum¬ 
bus, O., by Professor Hine. European writers refer to a form 
under this name, but Professor Kellogg, Proc. U. S. Nat. Mus. 
Vol. XXII, p. 48, says, “neither Osborn nor I have been able to 
find the original record for this species.” Hence the figure and 
description given in this paper. 
This work was done mostly in the Zoological Laboratory of 
Ohio State University under the directoin of Professor Herbert 
Osborn, whose kindly assistance is hereby gratefully acknowl¬ 
edged. Thanks are due also to Professor Jas. S. Hine for access 
to his collection of Mallophaga. 
THE DEPOSITS OF GLASS SAND AT TOBOSO, OHIO . 1 
F. Carney and A. M. Brumback. 
This glass sand quarry, about one half mile west of Toboso, 
on the Baltimore & Ohio railroad, is conveniently reached by 
traction line from Newark to Zanesville, leaving the car at the 
Black Hand station. The quarry, located in a cliff bank on the 
south wall of the Licking which joins the Muskingum at Zanes¬ 
ville, is owned by the Edward H. Everett Company of Newark, 
Ohio. The sand produced is used chiefly by the American 
Bottle Company of the same place. This company manufact¬ 
ures annually about 1,000,000 gross of amber and green bottles. 2 
The rock used here for glass sand belongs to the Black Hand 
formation of the Waverly series, Mississippian period. A section 
at the quarry, measured and described by Professor Charles 
S. Prosser, is as follows : 
1. Presented at the Annual Meeting of the Ohio Academy of Science, 
Oxford, Nov. 30. 1907. 
2. Figures supplied by Mr. J. M. Keckley, employed by the American 
Bottle Company, Newark, O. 
