170 
Larger species (614-8 mm.) ; head bronzy black, with short sparse pubescence; 
sides of pronotum straight or slightly arcuate, apical expansion of pale 
median line of scutellum parallel-sided or narrowed anteriorly, bordered by 
black: ‘shading vs coc.oior e526 accerac) oon oidrdule ale ieiare areata a shece! em ayainie eteye ete bijugis. 
Smaller species (4%4-61% mm.); head black, with rather dense longer whitish 
pubescence; sides of pronotum concave at middle, hind angles more acute; 
apical expansion of pale median line of scutellum bordered with a black 
line ‘and. broader (AnCerior ly’ 5 2i5/n5, cieieie ere eastern ope vate e chamtetetnye wip airtel parvulus. 
HoMAEMUS AENIFRONS Say 
Scutellera aenifrons Say, Narr. [Keating’s] of Exped. [Long’s] to Source of 
St. Peter’s Riv., etc., 1823, Vol. 2, App., p. 40. 1825. Also Say’s Compl. 
Writ. Ent., N. A., Vol. 1, p. 199. 
From the Illinois valley sand-region near Havana and Forest City. 
Nymphs were taken June 6, and imagines June 27 and 29, August 15 and 
20, and September 11 and 20. Also a single specimen frém Rock Island 
in June. Parkdale, Minn., August 28 (Zetek). Taken in sweepings in 
grassy areas. Ranges across the continent from Canada south to Mary- 
land and New Mexico. 
HomAEMUws Bryucis Uhl. 
Homaemus bijugis Uhler, Prel. Rep. [1871] U. S. Geol. Surv. Montana, etc., 
p. 393. 1872. 
One specimen from Union Grove, Ill., in the sandy region along the 
upper Mississippi, July 13, 6 specimens from Elizabeth, Ill., July 6, 7, 1917 
(Hart and Malloch) ; Fergus Falls, Minn., July 10 and 17 (Zetek). Arid 
plains, Nevada and Colorado to Nebraska and Iowa (Van Duzee). The 
males are smaller than the females, and have more obscure markings. 
* HoMAEMUS PARVULUS Germ. 
Pachycoris parvulus Germar, Zeit. f. Ent., Vol. 1, p. 107. 1839. 
Tetyra grammica Auct., nec Wolff, Icones Cimicum, Fase. 5, p. 172. 1811. 
Taken in sweepings in southern Illinois at Odin, Dubois, Carbondale, 
Parker, and Cobden, May 8 to July 20; nymphs, May 30. Col. and Mex. 
east to N. C. and Fla. (V. D.). 
[In addition to characters given in key, parvulus may be distinguished 
from bijugis by the longer fifth ventral abdominal segment, which is 
usually at least half as long as sixth, the presence of lateral black spots on 
venter, and the shape of the anterior prothoracic ventral extension. ] 
2. STETHAULAX Bergr.* 
There is but one species of this genus recorded from North America. 
STETHAULAX MARMORATUS Say 
Tetyra marmorata Say, Descrip. n. sp. Heter. Hemip. N. A., 1831; Compl. 
Writ. Ent. N. A., Vol 1, p. 310. ; 
[* This genus was taken in Illinois subsequent to Mr. Hart’s death, and the treat- 
ment of it herein is by the editor.] 
