ace) N Por ibs. 
VOL. III. AUGUST, 1889. No. 4. 
PUPA HOLZINGERI, n. sp. 
BY DR. V. STERKI. 
N the spring of 1887, Mr. John A. Holzinger, of Winona, Minn., 
sent me a lot of small Pupa, among which there was one 
specimen of a new species. It was dead, weather-beaten, poor shell, 
but evidently adult. | By repeated, ever so careful examinations it 
broke to pieces, but not before I had made a drawing and description 
of it. Mr. Holzinger as well as a few of his students then endeay- 
ored to secure more specimens, but all their efforts have been in vain, 
so far. In 1888, in a vial with Pupa from northern Illinois sent by 
Mr. Wm. A. Marsh, I found a few more specimens of evidently the 
same species, the shells fresh and good. This year, at last, among a 
number of small Pupa collected at Davenport, Ia., I was lucky in 
detecting three more examples. The validity of the species was, 
consequently, established ; and on the other hand it proved to be a 
form quite distinct, not doubtfully separable from any other species. 
It is a more interesting and valuable addition to our mala- 
cological fauna as it belongs to a specifically American group,* viz. : 
that of P. armifera and P. contracta Say ; but it isas much smaller than 
the latter of the two named as this is than the former. Yet the 
three together form a well characterized and well defined group of 
evidently common origin, and it may be possible sometime, and 
* Tt is possible, and even probable, however, that certain species of Pupa 
described from eastern Asia range among the same group; yet as I have seen no 
specimens and know them only from the descriptions, I am unable to judge about 
them. 
