168 
Head in front broad and subtruncate. 
Sides of pronotum sinuate, lateral angles notched. 
Surface nearly smooth, pronotal collar slightly arcuate..... 2. Phimodera. 
Surface above corrugated, pronotal collar elevated hoodlike over base of 
Head! (OOP ecskin Sea Ae Noe cate tallette Ah oS eae ie ake poate oy Ne Beta ie Euptychodera Bergr. 
Sides of pronotum feebly arcuate, lateral angles entire (Cal., Colo., Nev., 
"WiyrOl)! xis ze santaveee uae cusheve ay bie Saevedp Bt aa Pettus awe HEME ie ce pa Vanduzeeina Schout. 
1. EuryGaster Lap. 
EURYGASTER ALTERNATUS Say 
Tetyra alternata Say, Am. Ent., Vol. 3, 1828; Compl. Writ. on Ent. N. A., 
Vol. 1, p. 94. 
Taken by the author in the grassy bog at Sun Lake, Lake Co., IIL, 
August 3 and 9. Other specimens are labeled “N. Ill.” We have it also 
from Minnesota, July 10 (Zetek). Can., U. S. from Me. to Cal., south 
to N. M. (V. D.). 
2. PHIMODERA Germ. 
PHIMODERA BINOTATA Say * 
Seutellera binotata Say, Narr. [Keating’s] of Exped. [Long’s] to Source 
of St. Peter’s Riv., etc., 1823, Vol. 2, App., p. 39. 1825. Also Say’s Compl. 
Writ. Ent. N. A., Vol. 1, p. 198. 
Two examples, taken by the author in the Illinois valley sand-region 
near Havana May 31 and October 29; eleven specimens, Havana, April 6, 
1917 (C. A. Hart, J. R. Malloch). 
Tribe TETYRINI 
Key To GENERA 
Osteolar opening nearer to hind coxa than to side margin. 
Osteole continued in a distinct canal. 
Costal border of elytra exposed not farther than middle of scutellum; canal 
long. 
Canal slender, slightly widened apically and curved forwards............ 
Pe tenet Re tae eo Os MORO ee Bris Fs Pic Inaud chkcoeieed aout 1. Homaemus. 
Canal greatly expanded apically into a punctate area and bent angularly 
forward [ventral prothoracic plate as in Pl. XVII, Fig. 18]—Fla., Tex., 
IN} ME (Bol) Arize prop Agdin vices wietsteiehersieretener Sphyrocoris Mayr. 
Costal border of elytra exposed beyond middle of scutellum. 
Sulcus on dorsal face of tibiae divided lengthwise into two sulci by a 
slieht ridge, ‘at least Daag: svc cus. oes; ove.u, svecnvn faserey st bastateue) aiele 2. Stethaulax. 
Sulcus on dorsal face of tibiae simple (Fla., Trop. Am.)....3. Symphylus 
Osteole not continued in a distinct canal. 
Pronotum without transverse impression near middle—S. C. and Fla. to 
FTW eh ie ie oat eS Lo Oe tats eaac pe tebe teeth Mtaneaii tates eae dete a Diolcus Mayr. 
{* Mr. Hart was not sure of the identification of this species, but material col- 
lected in 1917 leaves no doubt in my mind as to the correctness of the identification.] 
