8 IOWA STUDIES IN NATURAL HISTORY 
ly crumbling walls of the ancient structures and fortifications 
on this historic spot, and a good series of both adults and nymphs 
in various stages of development was taken on June 24. 
Again, on June 26 several specimens were taken at Blizard’s 
Mill. This structure, as indicated by the legend on a stone slab 
above the doorway, was erected in 1758 by G. Blizard, and was 
once used for grinding sugar cane, the motive power being de- 
rived from the wind. Nothing now remains of the old wind- 
mill except for ruins of the stone foundation, and the place is 
grown up in weeds and grass affording both food and shelter 
for these as well as many other insects. 
In former years, small plots on the hills northeast of the 
village of English Harbor had been under cultivation, but more 
recently they have been permitted to grow up in grass and 
weeds. In such areas collecting was good, and Heteroptera in 
particular were common. On the guinea grass, a common plant 
in such situations, the present form, in both adult and nymphal 
stages, was taken in some numbers on July 5 and 10. 
The females are larger, on the average, than the males; but 
two or three of the latter form exceptions in that they are as 
large as the largest females. Both the large and small males 
are uniformly punctured with brown on a yellowish or yellowish 
green background; the brown patches and fascia are pronounced 
in all the females. 
A number of specimens of this species collected in Porto Rico 
by Mr. August Buseck are in the collections of the United States 
National Museum. 
Sphyrocoris obliquus (Germar) 
Plate I, Fig. 3 
1839. Pachycoris obliquus Germar, Zeitschr. Ent., Vol. 1, 94. 
Of this form but three specimens were taken on the following 
dates and under the circumstances indicated: July 3, guinea 
grass near the village of English Harbor; July 5, abandoned 
and reverted field northeast of English Harbor; July 8, 
Falmouth. 
I have also a specimen from St. Vincent and one from the 
island of Bequia, both in about the same latitude as Barbados, 
but approximately one hundred miles west of it. We did not 
