10 . . HEMIPTERA-HETEROPTERA. 
Odontoscelis, Germ. Zeitschr. i. 1, p. 36 (1839). 
Corimelena, White, Mag. Nat. Hist. iii. (1839) ; Dall. List Hem. i. p. 54 (1851) ; Uhler, Bull. U.S. 
Geol. & Geog. Surv. iii. p. 365 (1877). 
Coreomelas, A. & S. Hem. p. 67 (1848). 
Galgupha, A. & S. Hem. p. 68 (1848). 
With this genus, which has been placed by some writers (anté, p. 1) in other sub- 
families, we meet with a different section of the Cydnine. The body is more or less 
ovate, and the scutellum large, not covering the outer margin of the corium, but in 
many cases almost or quite covering the membrane. ‘Tibiz more or less spinous. 
1. Thyreocoris cerulescens. 
Thyreocoris cerulescens, Stal, Stett. ent. Zeit. xxiii. p. 94. 42°. 
Corimelena cerulescens, Uhler, Bull. U.S. Geol. & Geog. Surv. ii. p. 270”. 
Corimelena cyanea, Uhler, Bull. U.S. Geol. & Geog. Surv. ii. p. 2703. 
Corimelena cyaneonigra, Walk. Cat. Het. i. p. 784; ib. iii. p. 522. 
Hab. Norta America, Arizona?3, California? 3, Kansas?, Colorado?.—Mexico!?4; 
GUATEMALA, Capetillo (Champion). 
Dr. Signoret, who has examined specimens, informs me that the C. cyanea, Uhler, 
=T. cerulescens, Stal. 
2. Thyreocoris nitiduloides. 
Cimex nitiduloides, Wolff, Ic. iii. p. 98. 92, fig. 921. 
Odontoscelis nitiduloides, Germ. Zeitschr. i. p. 87. 17; H.-S. Wanz. v. pp. 12 et 33, fig. 471. 
Corimelena nitiduloides, Dall. List Hem. i. p. 56. 23; Ubler, Bull. U.S. Geol. & Geog. Surv. ii. 
p- 269%, iii. p. 865°; Proc. Bost. Soc. Nat. Hist. xix. p. 366. 
Thyreocoris histeroides, Say, Heteropt. . 
Hab. Nortu America, Pennsylvania!?, Lake Erie, Vermont®, Colorado*®.—Mexico, 
Alvarez Mountains (Dr. Palmer); Guatemata, Duefias (Champion), Calderas (Champion). 
Prof. Uhler states that this species was obtained above the “ timber-line” in the 
mountains of Colorado by Lieut. W. L. Carpenter, and from that elevation differed in 
no important manner from the specimens common to Kansas, Texas, Missouri, and 
the Atlantic region. It was found in the month of August near Colorado springs, con- 
cealed among the roots of Yuccas and other plants. Prof. Uhler has had the oppor- 
tunity of examining a specimen of 7. histeroides, Say, from the collection of Dr. Harris, 
determined by Say himself, and pronounces it to be conspecific with 7. nitiduloides. 
8. Thyreocoris rastratus. (Tab. III. fig. 5.) 
Corimelena rastrata, Stal, Rio Hem. i. p. 8. 2!. 
_ Thyreocoris rastratus, Stal, Stett. ent. Zeit. xxiii. p. 94. 41??; En. Hem. v. p. 23. 43. 
Hab. Mexico?; British Honpuras, Rio Hondo (Blancaneaux); GuateMaLa, Tamahu 
(Champion).—Cotompia’, Brazit 8, 
