SCUTELLEROIDEA OF IOWA 69 
teriorly; lateral margins impunctate, the edges slightly arcuate; lateral 
angles rounded, not prominent. Scutellum with five pale impunctate vittae 
becoming confluent on posterior half; punctuation sparse at base, finer and 
more regular towards apex. Coriaceous portion of hemelytra thickly, 
finely punctured with black, the costal margin and lines following the 
veins sometimes pale and impunctate; membrane pale brownish, semi- 
transparent. Tergum black, the connexivum pale but alternated with black 
at the incisures. Venter pale clay yellow, thickly, finely punctate; a more 
or less interrupted lateral vitta of black punctures extends from behind the 
eyes nearly to tip of abdomen. Ventral plates of prothorax pale yellow, 
coarsely, irregularly punctured with black. Legs pale yellow, thickly 
clothed with short fine hairs; femora with a more or less complete 
brownish annulus near tip; tibiae darker towards apex; tarsi brownish, the 
apical segment and claws black. Length, 5.5-9.0 mm. Width across pro- 
notum, 3.5-5.0 mm. 
This insect 1s subject to the ordinary amount of variation in 
size, punctuation and color but may at once be distinguished 
from the other lowa representative of the genus by the char- 
acters mentioned in the key and the description. It is widely 
distributed but in Iowa it is not common anywhere. Only six 
specimens are at hand from Boone, Ft. Madison and Red Oak. 
This species was erroneously listed from the Lake Okoboji re- 
gion (Stoner, The Pentatomoidea of the Lake Okoboji 
Region, Bull. Lab. Nat. Hist. 8. U. IL, VII, No. 3, 44, 1917) 
but that citation should have been for the other Iowa repre- 
sentative of the genus, 7. atricorms. Osborn recorded T. semi- 
vittata as not common in lowa. 
At Ft. Madison on June 30 specimens were swept from rank 
weeds growing in a small uncultivated area situated between a 
wooded plot and a grain field. On July 4 a single specimen 
was taken from wild carrot (Daucus carota Linn.) near Boone. 
‘“T onee found this insect in large numbers on earrot blossoms in 
a waste field near Buffalo as late as November 3d. They were in 
all stages of development, and I was surprised to find that the 
imagoes were blackish at first with the connexivum margined 
with pale. After they attained full maturity they assumed their 
ordinary pale color, with the connexivum maculated.’’ (Van 
Duzee, l.c.) Blatechley (Can. Ent., XXVIII, 266, 1896) records 
the species from Vigo. county, Indiana, and states that on Sep- 
tember 9, 1894, it was ‘‘common in all stages, on the heads, and 
in the angles of the leaves, of the plant known as Rattle- 
