120 IOWA STUDIES IN NATURAL HISTORY 
1859. Pentatoma exapta Say, Compl. Writ., II, 240. 
1861. Zicrona exapta Uhler, Proc, Ent. Soc. Phila., I, 23. 
1878. Perillus exaptus Uhler, Proc. Bost. Soc. Nat. Hist., XIX, 369. 
1904. Perillus exaptus Van Duzee, Trans. Am. Ent. Soc., XXX, 65. 
1907. Perilloides exaptus Schouteden, Gen. Ins., fase. 52, 38, Pl. 3, fig. 2. 
Elongate oval, not narrowing much behind. Color above deep blue black, 
somewhat shining, closely punctate; margins of pronotum, scutellum and 
hemelytra yellowish fulvous to crimson. Head black, thickly, deeply 
punctured, the anterior and sometimes the lateral margins pale; a pale 
spot in the median line at the posterior margin; sutures below pale. Eyes 
fuscous. Rostrum fuscous, moderately stout, reaching to posterior coxae. 
Antennae black, incisures and sometimes base of first segment pale. Pro- 
notum rather closely and regularly punctate; yellowish fulvous with a broad 
transverse black band anteriorly and a narrower one on posterior margin; 
humeral angles not prominent. Scutellum black, except a broad submar- 
ginal yellowish fulvous vitta which is sparsely, finely punctured with 
fuscous; base punctured about like pronotum, the apical half much more 
finely and sparsely punctured. Hemelytra blue black with yellowish 
fulvous costal margin; embolium much more closely punctate than corium; 
membrane fuscous. Venter yellowish fulvous marked irregularly with 
black, rather regularly and densely punctured except on median line; 
connexivum entirely yellowish or fulvous, sometimes black margined with 
yellowish fulvous. Ventral spine very short, not reaching posterior coxae. 
Legs fuscous or black, irregularly punctured, all the tibiae banded with 
yellowish or fulvous; sometimes also the under sides of femora partake of 
this color; anterior femora furnished with a short blunt tubercle. Side 
pieces of thorax mostly black with the pale coxae standing out conspicu- 
ously. Length, 5.0-7.5 mm. Width across pronotum, 4.0-4.5 mm. 
In the male, on either side of the median line of the fourth 
and fifth visible ventral segments is an elongate area thickly 
covered with decumbent yellowish brown hairs. 
This is an exceedingly variable species which, in some cont or 
another, is distributed from New England to Vancouver Island; 
in the east, south to New Jersey and in the west to Lower Cali- 
fornia. The variations which occur are mainly due to the rela- 
tive amounts of the predominating colors present, black and 
yellowish fulvous, and to some extent to the disposition of these 
colors. The intensity of the pale color also varies from pale 
yellow to rich crimson and, indeed, the entire insect may vary 
from wholly black to crimson. 
Professor Osborn’s records of Little Rock and Ames remain 
the only two available for this species in Iowa. 
