SCUTELLEROIDEA OF IOWA 91 
1859. Pentatoma nervosa Say, Compl. Writ., I, 321. 
1872. Hymenarcys nervosa Stal, Svensk. Vet. Handl., 10, no. 4, 31. 
1876. Hymenarcys nervosa Uhler, Bull. U. S. Geol. Geogr. Surv., II, 287. 
1904. Hymenarcys nervosa Van Duzee, Trans. Am. Ent. Soc., XXX, 49. 
1909. Hymenarcys nervosa Kirkaldy, Cat. Hem. (Heterop.), I, 72. 
General form rather broadly ovate. Color reddish brown to rufous with 
large, distinct and regularly arranged black punctures. Punctuation of 
head finer and closer. Head somewhat flattened above, the sinuation be- 
fore the eyes pronounced; juga not longer than tylus, the latter distinctly 
elevated, impunctate on the middle and feebly so at the margins. An- 
tennae reddish yellow to rufous, the entire apical segment and apical half 
of fourth segment dusky; second segment little more than half the length 
of third. Rostrum yellowish with black median line and apical segment; 
extending just behind midcoxae. Pronotum rather coarsely, regularly 
punctate, the antero-lateral margins a little convexly arcuated; humeri 
slightly prominent, obtusely rounded. Scutellum short, regularly punctate, 
a more or less distinct impunctate yellowish area on median line at base 
and at each basal angle; lateral edges at base rounded leaving an interval 
between basal angles and pronotum; apex rather broadly rounded, the tip 
narrowly pale. Hemelytra a little more finely punctured than scutellum; 
membrane brownish, the irregularly anastomosing nervures darker. ‘Ter- 
gum blackish, rather finely, irregularly punctate, the margins which project 
considerably beyond hemelytra alternated with yellow and black. Beneath 
pale yellowish to rufous with large black punctures on thoracic plates and 
smaller red ones on abdomen; a broad and more or less interrupted black- 
ish vitta extends backwards on either side from the eye to near the apex 
of the venter where it becomes obsolete; a black spot both posterior and 
anterior to each incisure at the margins; last ventral segment of female 
with a more or less distinct blackish median vitta. Legs yellowish with 
numerous black dots. Length, 9.0-11.5 mm. Width across pronotum, 5.5- 
7.0 mm. 
This is the larger and more broadly ovate representative of 
the genus in Iowa. Osborn recorded it as ‘“‘Usually rare’’ in 
the state and we have found it in but few places, Burlington, 
Iowa City and Red Oak being our only locality records. 
As with the preceding form, most of the specimens taken have 
been hibernating individuals captured either in early spring or 
late fall. Specimens have been found in early February under 
stones in waste places overgrown with weeds and vegetation 
during the summer. Several living specimens have been picked 
out of the frozen soil in such situations. Hibernating specimens 
have often been found under leaves in semi-wooded areas and 
under boards and sticks in pastures. 
