116 HEMIPTERA-HETEROPTERA. 
emarginate between the antenniferous tubercles. The genus at present contains but 
the following species :— 
1. Sagotylus confluentus. 
Coreus confluentus, Say, Heterop. New Harm. ii. n. 1; Compl. Writ. i. p. 325. 1°. 
Crinocerus triguttatus, H.-S. Wanz. Ins. vi. p. 86, fig. 656 *. 
Mictis? triguttata, Dall. List Hem. ii. p. 402. 45°. 
Sagotylus triguttatus, Stal, En. Hem. i. p. 148. 1*. 
Mictoides triguttata, Walk. Cat. Het. iv. p. 88. 2°. 
Sagotylus confluentus, Uhler, Bull. U.S. Geol. & Geog. Surv. i. p. 297°. | 
Hab. Norta America}, Arizona ®, California °.—Mexico 12346, Orizaba®; Britisu 
Honpuras, Rio Hondo (Blancaneaux) ; Guatemata, Capetillo, San Gerénimo, Guatemala 
city, Chacoj (Champion), Escuintla (Mus. Vind. Ces.). 
I have followed Prof. Uhler in considering Say’s name as the earliest for this species. 
Stal (En. Hem. i. p. 174) placed it as a synonym of Spartocera fusca, Thunb. 
S. confluentus varies much in the amount of its black markings. The two large 
subbasal spots to the pronotum, as shown in Herrich-Schaffer’s figure, diminish in 
size in different specimens, until in some they are totally obliterated. The quantity of 
black coloration on the underside of the body is also inconstant. Say’s type appears to 
be one of the protean forms of the species in which the scutellum is not wholly black. 
ACANTHOCERUS. 
Acanthocerus, Palisot de Beauvois, Ins. p. 204 (1805); Stal, En. Hem. i. p. 144 (1870). 
Acanthocerus, subj. Hymeniphera, Lap. Ess. Hém. p. 43 (1882). 
Hymenophora, Amyot & Serville, Hist. des. Hém. p. 212 (1843) ; Mayr, Reise d. Nov., Hem. p. 88 
(1866) ; Stal, Ofv. Vet.-Ak. Forh. 1867, p. 539. 
Camptischium, Amyot & Serville, Hist. des Hém. p. 213 (1843) ; Mayr, Reise d. Nov., Hem. p. 89; 
Stal, Ofv. Vet.-Ak. Forh. 1867, p. 539. 
Euthochtha, Mayr, Verh. zool.-bot. Ges. Wien, xv. p. 481 (1865); Reise d. Nov., Hem. p. 88 (1866) ; 
Stal, Ofv. Vet.-Ak. Forh. 1867, p. 539. 
In this genus the antenniferous tubercles are externally spinous, the lateral pronotal 
angles spinous and acutely produced, the lateral pronotal margins are distinctly denti- 
culated, and the metasternum at the outer margins of the posterior coxe is produced 
into a tooth-like lobe. Five species are enumerated by Stal, all of which are Neo- 
tropical: three appear to be peculiar to the Antilles; and only one has been received 
from Central America :— 
1. Acanthocerus clavipes. 
Coreus clavipes, Fabr. Syst. Rhynch. p. 196. 20. 
Crinocerus fulvicornis, H.-S. Wanz. Ins. vi. p. 87, f. 657°; Dall. List Hem. ii. p. 408. 5°. 
Camptischium spinosum, A. & 8. Hist. des Hém. p. 218. 1, t. 4. f. 5%. 
