183 
4, Denprocoris Bergr.* 
There is but one species of this genus in our Illinois material, though 
we have apparently six species from the United States in the collection. 
DENDROCORIS HUMERALIS Uhl. 
Liotropis humeralis Uhler, Bul. U. 8S. Geol. and Geogr. Surv. Terr., Vol. 3, 
No. 2, p. 400. 1877. 
This species is not uncommonly swept from black-jack oak at 
Havana, Forest City, and Meredosia. It also occurs under similar con- 
ditions at Alto Pass and Dubois. Other localities for Illinois are Gales- 
burg, White Heath, Carbondale; and one specimen is labeled “N. III.” 
Other states: Vt., Mass., N. J., Pa. Md., W. Va., Ga., Ohio, Iowa, Kan., 
Col., Cal.? (V.D). 
Mr. Van Duzee places a question mark after the California record. 
Possibly the specimen or specimens referred to are identical with one in 
our collection from Yosemite Valley, Cal., which is closely related to 
humeralis though evidently specifically distinct. 
The male hypopygia of the species before me are all of similar 
structure (PI. XVIII, Fig 28), and differ strikingly from those of 
Thyanta. The female genitalia differ from those of Thyanta and allied 
genera in having the basal plates concealed beneath the preceding ventral 
segment. , 
Mr. W. L. McAtee informs me that he has taken some specimens of 
humeralis that differ from the normal form in having the juga separated 
at apices. These specimens were taken in the vicinity of Washington, 
Dae 
Mr. Van Duzee in his recent catalogue lists Dendrocoris near the 
end of its tribe, placing Arvelius before it and after Thyanta. 
5. CHLOROCHROA 
CHLOROCHROA UHLERI Stal + 
Chlorochroa uhleri Stal, Enum. Hemip., Pt. 2, p. 33. 1872. 
Chlorochroa persimilis Horvath, Ann. Mus. Natl. Hung., Vol. 6, p. 555. 1908. 
This species is exceedingly abundant in the Illinois valley sand- 
regions, swarming on Opuntia rafinesquii, and feeding mostly at the tip 
of the fruits when these are present. I have also taken it in the sand 
dunes of the Chicago area on dwarf cedar (Juniperus sabina). Vestal 
says that it also occurs on Chrysopsis, Kuhnia, Ambrosia psilostachya, 
Lespedeza capitata, and grasses. In the Illinois valley we have it from 
Forest City, Manito, Bishop, Havana, Bath, Arenzville, and Meredosia. 
Inthe Chicago area we have it from Beach and Waukegan; and there are 
also single examples from Eureka, near the Illinois valley sands, from 
Mascoutah, near St. Louis, and from Dubois. The dates are April 1, 4, 9; 
June 5, 6, 10; August 7, 12, 13, 14, 18, 22, 24; September 28, 30; Octo- 
[* Treatment of this genus is by the editor.] 
[tj In Mr. Hart’s MS. he uses the name persinilis, but Van Duzee's Catalogue 
gives this as a synonym of whleri, in which he is followed here by the editor.] 
