SCUTELLEROIDEA OF IOWA 79 
Key to the species 
Pronotum without raised irregular line connecting the humeri 
A minute black dot at lateral angles of ventral abdominal 
segments 
Venter without black spots on median line 
Juga not or very little longer than tylus leaving head 
Rounded: or truncate at. apex. 2c. S-. <6 Se: wie oe oc servus 
Juga distinctly longer than tylus leaving apex of head 
Spee MEISE CS ies od ks ce io cee Sa Se ', .euschistoides 
Venter with a row of black spots, sometimes almost obsolete 
Humeri rounded; antennae with fifth and apical half of 
mePHSCOMENTS DIACK 255) 5c ans oe ee. tristigmus 
Humeri acute or spinose; antennae entirely pale or 
TEESE oe Oe eae eee tristigmus var. pyrrhocerus 
No black dot at lateral angles of ventral abdominal seg- 
MS ae BS oe a Se an variolarius 
Pronotum with a raised, impunctate, irregular line between 
SLOT TER ETS 07 USES Re a ee ictericus 
Euschistus servus (Say) 
1831. Pentatoma serva Say, Descr. Het. Hem., 4. 
1837. Pentatoma spilota Westwood, Cat. Hope, I, 42. 
1859. Pentatoma serva Say, Compl. Writ., I, 314. 
1872. Euschistus servus Stal, Svensk. Vet. Handl., 10, no. 4, 26. 
1877. Euschistus servus Uhler, Bull. U. S. Geol. Geogr. Surv., III, 402. 
1904. Euschistus servus Van Duzee, Trans. Am. Ent. Soec., XXX, 45. 
General form broadly ovate, widest opposite apex of scutellum. Generali 
color pale yellow to reddish yellow, the upper surface rather finely, irregu- 
larly punctate, the juga a little longer than tylus, the margins of the head 
before the eyes slightly sinuate; a black line from eyes to base of antennae. 
Antennae pale yellowish to reddish yellow with black points; the two apical 
segments more or less dusky; second segment almost as long as third. 
Rostrum extending between posterior coxae. Pronotum more irregularly, 
sparsely punctate on anterior half, the antero-lateral edges crenulate and 
coneavely arcuated; humeri prominent but not angulate. Scutellum broad 
at base ,irregularly punctate with black, the punctures finer towards the 
tip; apex whitish. Hemelytra more closely and deeply punctate, the 
punctuation of corium more regular than that of embolium; membrane 
dusky dotted with fuscous, the nervures simple, distinct. Tergum blackish 
with irregular yellowish spots at margins. Venter pale yellowish, irregu- 
larly punctured with reddish, minutely rugulose and with a black point at 
the postero-lateral edge of each incisure; no distinct black spot or row of 
spots on median line. Ventral thoracic plates coarsely irregularly punc- 
