50 IOWA STUDIES IN NATURAL HISTORY 
The specimen is a male, taken in August, and forms the only 
available record of the species for the region. 
The present form is to be distinguished from 7’. ater by its 
smaller size, less broadly ovate form, deeper and denser punc- 
tuation and therefore less shiny appearance. 
In general, this insect has about the same distribution as the 
preceding form, although it has not been so commonly met 
with in northern United States and Canada as T. ater. This 
indication of relative abundance and occurrence is borne out by 
our records. 
Thyreocoris pulicarius (Germ.) 
The first specimen of this species was taken just north of 
Ingleside July 22, 1919. The field was grown up in red top, 
together with a little timothy, and numerous plants of the 
bristly crowfoot (Ranunculus pennsylvanicus) were growing 
here and there. But one other specimen was taken during the 
remainder of the season; it was secured on August 6 in sweep- 
ings made in a low moist place a few miles west of Pellston. 
Specimens of the species were not taken during the season of 
1920. ; 
This form is considerably smaller (2.5—3.0 mm.) than either 
of the preceding, and is the only one here recorded in which 
the margins of the hemelytra are pale. 
Subfamily Cydnine 
Cydnus sp. 
A fragment of the prothorax, the front femora and tibize 
constitute the material which I include under the above generic 
name. Although I cannot associate these fragments with any 
species of ecydnid in my collection, I feel that they were at one 
time possessed by a form either in or near this genus as it is 
now understood. These remains were found around the roots 
of wild rye (Elymus canadensis) growing along the beach west 
of Grapevine Point. Careful search was made here and else- 
where on several occasions during both seasons for living ex- 
amples, but none were found. 
Sehirus cinctus (P. B.) 
But seven specimens were found during the entire two sea- 
sons of collecting. One specimen was taken July 7. The other 
