12 IOWA STUDIES IN NATURAL HISTORY 
9; uncultivated areas in the hills northeast of English Harbor. 
On July 12, following a heavy rain, I again visited the un- 
cultivated areas northeast of English Harbor, where, on the tall, 
coarse grass growing in the little gullies on the hillsides which 
had been much refreshed by the recent downpour, five adults 
and several nymphs of this form were taken. 
Thyanta perditor (Fabricius) 
Plate I, Fig. 9 
1794. Cimex perditor Fabricius, Ent. Syst., Vol. 1v, 102. 
Our collection contains numerous examples from Barbados 
which were swept from succulent vegetation growing in low or 
more or less protected situations. 
The specimens vary from dark green to testaceous with the 
sanguineous median line on tylus and interhumeral band well 
marked. Pronotal angles very acute and inclined sharply for- 
ward. Connexivum pale yellowish to fulvous alternated with 
black or green. Basal portion of membrane with a greater or 
less number of brownish or blackish dots. 
About forty specimens were also taken at Antigua; more than 
one-third of these depart from the usual dark greenish coloration 
in that they are pale testaceous. 
This is a widely distributed and, in some places, a common 
species occurring in most of the West India Islands and on the 
continent from northern Brazil to Georgia and Colorado. 
Thyanta casta Stal 
Plate I, Fig. 10 
1862. Thyanta casta Stal, Stett. Ent. Zeit., Vol. xx11, 104. 
But two specimens were taken at Barbados. In these the 
punctuation is coarse, and the pronotum and hemelytra have 
a somewhat calloused appearance. There is a slender black line 
on the extreme edge of each pronotal angle. Length, 8.75 mm. 
About twenty examples were taken by us at Antigua. 
Uhler records this as the least common of the three ibacsiask 
of the genus taken by him on Grenada. 
