28 IOWA STUDIES IN NATURAL HISTORY 
and is not expanded at the base, by the two elongate whitish spots 
at the apical margin of the abdomen, by the more regular and 
distinct punctuation and by the large smooth area over the cal. 
losities; lateralis is also broader than pulicarius, the broadest 
portion being behind the thorax. 
Needless to say, some variation obtains in size, punctuation 
and coloration. Uhler says (l. c.), ‘‘In Maryland, specimens 
sometimes occur which are destitute of the lateral pale margin; 
and near Baltimore may be found all the varieties between the 
extremes of color and punctuation.’’ The Iowa specimens at 
hand do not show this extreme of variation in color but great 
variation in punctuation is apparent; some individuals show an 
almost smooth median dorsal longitudinal line. 
This form is widely distributed, being found in eastern United 
States from Maine to southern Florida and southwest to Texas 
and Mexico. However, in Iowa it seems not to be common any- 
where. Only about twenty specimens are at hand from the fol- 
lowing localities: Ames, Anamosa, Iowa City, Lake Okoboji, 
McGregor and Solon. As is the case with the preceding forms, 
specimens of this species are usually found on vegetation along 
the edges of woods in more or less moist situations. 
Thyreocoris pulicarvus (Germar) 
1839. Odontoscelis pulicarius Germar, Zeitschr. Ent., I, 39. 
1851. Corimelaena pulicarius Dallas, List Hem., I, 59. 
1851. Corimebaena marginella Dallas, List Hem., I, 59. 
1865. Galgupha flavomarginata Thomas, Trans. Ill. Sta. Agr. Soe., V, 455. 
1876. Corimelaena pulicaria Uhler, Bull. U. S. Geol. Geogr. Surv., II, 271. 
1876. Thyreocoris pulicarius Stal, Svensk. Vet. Handl., 14, no. 4, 28. 
1886. +Corimelaena tibialis Uhler, Check List, 2. 
1904. Corimelaena pulicaria Van Duzee, Trans. Am. Ent. Soc., XXX, 9. 
General form ovate, widest across base of thorax. Shining black or 
bronzed and very closely and finely punctate. Head a little broader than 
long, narrowing sharply in front and with the margins slightly sinuate; 
closely, finely and almost uniformly - punctate. Eyes reddish brown. 
Antennae reddish brown, covered with yellowish pubescence, the two apical 
segments much darker. Rostrum dark reddish brown to black, paler at the 
joints; extending between midcoxae. Pronotum black, shining, very convex, 
narrowed anteriorly, the humeri very prominent, rounded. Scutellum very 
convex. A deep and densely punctate oblique depression at either side 
of base; disk sparsely, finely punctate, the punctuation gradually becom- 
ing more dense towards margins; sides near the base rather strongly sharply 
sinuate. Hemelytra with base and extreme inner area of coriaceous portion 
