SCUTELLEROIDEA OF IOWA 27 
tute the principal reason for determining them as 7’. niger. The 
character of the impressed lines and punctuation mentioned by 
Zimmer (1. c. 27), I am unable to work out from the specimens at 
hand. 
The species is more characteristic of the western fauna having 
been recorded from Colorado, Nebraska, Kansas, Arizona and 
Ontario. 
Thyreocoris lateralis (Fabricius) 
1803. Tetyra lateralis Fabricius, Syst. Rhyng., 142. 
1811. Tetyra lateralis Wolff, Ic. Cim., V, 175. 
1839. Odontoscelis lateralis Germar, Zeitschr. Ent., I, 39. 
1876. Thyreocoris lateralis Stal, Svensk. Vet. Handl., 14, no. 4, 23. 
1876. Oorimelaena lateralis Uhler, Bull. U. S. Geol. Geogr. Surv., II, 271. 
1904. Corimelaena Gillettii Van Duzee, Trans. Am. Ent. Soc., XXX, 8. 
1911. Thyreocoris lateralis Zimmer, Univ. Neb. Contrib. Dept. Ent., no. 4, 28. 
‘General form broadly ovate, widest behind thorax. Deep black to 
bronzed, shining, distinctly and rather regularly punctured. Head short, 
broad, convex, very closely and uniformly punctate except a small dis- 
tinct area on either side of the median line at the base; tylus a little 
longer than lateral lobes. Antennae reddish brown, covered with fine 
yellowish pubescence, the two apical segments slightly darker. Rostrum 
dark brown, paler at the joints; extending to posterior coxae. Pronotum 
black, convex, more or less shining, not narrowed so much anteriorly as in 
T. pulicarius; the surface anterior and posterior to humeral angles dis- 
tinctly impressed; smooth area over the callosities large and well defined; 
the disk posteriorly a little less heavily punctured than in T. pulicarius. 
Secutellum sparsely, finely punctured on disk, the punctuation becoming 
more dense towards margins; the densely punctate depression at either 
side of the base is relatively shallower than in T. pulicarius; sinuation at 
sides of base not so sharp or deep as in that species. Hemelytra black 
with a narrow, yellowish white costal vitta extending from base to apex 
where it is widest; the inner black area of the coriaceous portion densely 
punctate; costal vitta with a few sparsely arranged brownish punctures. 
Venter bronzed black, moderately convex, highly polished, finely, closely 
punctured, the punctures a little denser towards the sides; edge of ab- 
domen with a heavy, distinct yellowish line on the sixth segment and a 
similar one at the edge of the genital segment in the female; apex of 
sixth ventral segment in female regularly arcuated. Ostiolar canal as in 
‘T. pulicarius. Legs black, knees paler; tibial spines proportionately small: 
er than in T. pulicarius; tarsi yellowish brown. Length, 3.5-4.0 mm. 
Width across pronotum, 2.5-3.0 mm. 
Of our two forms of Thyreocoris which have the yellowish 
costal margin on the corium, this is the larger. In addition, it 
is easily separated from 7. pultcarius, its nearest ally in our fauna 
by the narrow, pale costal margin which is widest near the apex 
