278 HEMIPTERA-HETEROPTERA. 
annulated with fusco-testaceous ; the two hinder femora with indications of a fuscous ring a little beyond 
the middle. Head shorter than the pronotum, armed with two small tubercles before the eyes, the latter 
rather large and prominent; antenne as in C. nigricornis, Pronotum armed with two long spines on 
the disc of the posterior lobe and with a long spine at each of the lateral angles; the anterior angles 
tuberculate and not prominent; the posterior lobe with very fine punctures showing through from 
beneath. Elytra nearly twice as long as the abdomen. 
Length to apex of the abdomen 103, to that of the elytra about 14; breadth 3 millim. 
Hab. Costa Rica, Talamanca (Mus. Holm.). 
One specimen. Perhaps a variety of C. nigricornis ? 
CASTOLUS. 
Castolus, Stal, Ofv. Vet-Ak. Férh. xv. p. 447 (1858), xxiii. p. 294 (1866); Enum. Hemipt. ii. 
pp. 69, 80. 
Spinda, Stal, Ofv. Vet.-Ak. Férh. xvi. p. 371 (1859), xxiii. p. 294 (1866). 
A Tropical-American genus including six described species, three of which inhabit 
our region, whence two others are now added. 
a. Lateral angles of the pronotum unarmed. 
a’, Posterior lobe of the pronotum, the margins excepted, and a broad 
fascia on the elytra, not reaching the apex and sometimes extending 
to the base, nigro-fuscous or black ; eyes rather small inthe male. plagiaticollis, Stal. 
b’. Posterior lobe of the pronotum, the margins excepted, the head in 
part, and a narrow transverse fascia below the base of the elytra, 
black, the narrow apical portion of the corium sanguineous, the 
membrane smoky ; eyes large in the male . . . . tricolor, n. sp. 
6. Lateral angles of the pronotum with a very short tooth ; the head in 
part, the small spots on the disc of the posterior lobe of the pronotum, 
and a streak at the base of the clavus, black . . . . . . . trinotatus, Stal. 
c. Lateral angles of the pronotum with a rather long stout tooth; elytra 
and disc of the pronotum in great part fuscous; legs pale, fusco- 
annulate, the anterior femora very stout . . . . . . subinermis, Stal. 
d. Lateral angles of the pronotum subangularly dilated ; pronotum, clavus, 
corium, and legs nigro-piceous or black, the posterior lobe of the 
pronotum with the basal and lateral margins sanguineous. . . . rufomarginatus, n. sp. 
1. Castolus plagiaticollis. (Tab. XVII. fig. 3, 2.) 
Castolus plagiaticollis, Stal, Ofv. Vet.-Ak. Férh. 1858, p. 447°; Enum. Hemipt. ii. p. 81°. 
Repipta plagiaticollis, Stal, Stett. ent. Zeit. 1862, p. 447°. 
Hab. Mexico? (Mus. Holm.1?; coll. Signoret, in Mus. Vind. Ces. ; Sallé), Presidio 
de Mazatlan (Forrer), Orizaba (Bilimek, in Mus. Vind. Ces.), Atoyac in Vera Cruz 
(Schumann ; H. H. Smith), Jalapa (Hoge), Chiapas (M. Trujillo); Guaremata, Cubilguitz 
and San Gerénimo in Vera Paz, Paraiso, Capetillo (Champion); Panama (Boucard), 
Bugaba, Volcan de Chiriqui (Champion). 
