90 IOWA STUDIES IN NATURAL HISTORY 
men, a little more finely punctate than scutellum; membrane dusky white 
to hyaline with a few brown spots, the venation sometimes not distinct 
but always irregularly fureate. Tergum black, closely and distinctly punc- 
tured towards apex, the margins alternated with pale orange and black. 
Beneath yellowish to grayish brown with a fulvous tinge. Venter thickly 
and finely punctate with brownish, the stigmata and a more or less in- 
distinct, irregular band on each side blackish. Ventral thoracic plates 
much more coarsely and sparsely punctured. Legs yellowish, thickly cov- 
ered with brown points; trochanters paler; tibiae tipped with brownish. 
Length, 7.0-9.0 mm. Width across pronotum, 3.5-4.5 mm. 
With the exception of Neottiglossa sulcifrons this is our small- 
est representative of the subfamily Pentatominae and may be 
easily distinguished from any other species in our fauna by the 
characters given above. It was recorded as not common by 
Osborn and this statement apparently also indicates its status at 
the present time, although it is the more common of our two 
Iowa representatives of the genus. Specimens are at hand from 
Bayfield, Cerro Gordo county, Corydon, De Witt, Hampton, 
Hills, Indianola, Iowa City, Monticello and Red Oak. 
Comparatively few of the seventy specimens thus far ob- 
tained have been taken in sweeping, most of them having been 
collected either late in the fall or early in spring in places which 
they had chosen for hibernation. Individuals have been found 
under small rocks in more or less sheltered situations as early as 
February 18, before the frost and ice in these places had melted. 
During the summer these rocky places were grown up in weeds 
and grass. Hibernating specimens have often been taken from 
beneath leaves along the edges of woods; loose sticks and boards 
in meadows also offer shelter during the winter months. Some- 
times specimens are found under the loose bark of decaying 
stumps of trees and under the dead leaves of mullein plants. 
On warm sunshiny days in late autumn and early spring speci- 
mens may often be found walking about on the sidewalks of 
cities. Our latest seasonal record is December 3. The few 
specimens taken with the sweep net were on low weeds and 
usually in more or less moist places. Nymphs of this species 
have not been discovered. 
Hymenarcys nervosa (Say) 
1831. Pentatoma nervosa Say, Descr. Het. Hem., 9. 
1837. Pentatoma pennsylvaniae Westwood, Cat. Hope, I, 35. 
1843. Hymenarcys perpunctata Amyot and Serville, Hém., 124. 
