46 HEMIPTERA-HETEROPTERA. 
This genus has the abdomen provided beneath with a distinct longitudinal furrow ; 
the basal joint of the antenn does not reach the apex of the head; and the lateral 
margins of the pronotum are smooth, not denticulated. 
Dinocoris is peculiar to the Neotropical fauna; three species are found in Central 
America. 
A. Second joint of the antenne shorter than the first. 
1. Dinocoris tripterus. (Tab. V. fig. 3.) 
Cimex tripterus, Fabr. Mant. ii. p. 294. 144; Gmel. Syst. Nat.i. 4, p. 2151. 300; Fabr. Ent. Syst. iv. 
p. 116. 139. 
Edessa triptera, Faby. Syst. Rhynch. p. 153. 36’. 
Cataulax apicalis, Er. in Schomb. Reis. iii. p. 609%. 
Antiteuchus tripterus, Stal, Hem. Fab. i. p. 19. 3. 
Dinocoris (Mecistorhinus) tripterus, Stal, En. Hem. ii. p. 8. 3°. 
Dinidor punctiger, Hope, Cat. i. p. 25. 
Antiteuchus punctiger, Dall. List Hem. i. p. 164. 34. 
Cataulax centralis, Walk. Cat. Het. iii. p. 566°. 
Dinocoris punctiger, Stal, En. Hem. ii. p. 9. 15. 
Hab. Mexico (Mus. Berol.); British Honpuras, Belize (Blancaneaur); NicaraGva, 
Chontales (Janson) ; Panama (coll. Dist.).—VENEZUELA*; Guiana, Demarara?4; Suri- 
nam %; Cayenne!; Amazons, 8. Paulo. 
This species is closely allied to D. sepulcralis, Fab., var., as figured by Stoll, Pun. 
fig. 94. Stal has described the antennz of both species (Hem. Fab. i. pp. 18 et 19), by 
which I differentiate it. The first joint in this species is longer than the second, but 
not “fere duplo longiore” as in D. sepulcralis; the third joint is rather more than three 
times as long as the second, but not ‘‘ plus quadruplo, fere quintuplo longiore” as in the 
other Fabrician species. In the specimen examined from the Berlin Museum, the first 
and second joints appear almost equal in length. 
I consider the Dinidor punctiger, Hope, as a varietal form of this species, on the 
authority of Prof. Westwood, to whom I forwarded a specimen of the form here figured, 
and who writes me “seems to be a variety of my punctiger, not having the very decided 
linear arrangement of the spots on the corium.” This appearance, however, is shown 
in one of the specimens identified by Dallas, but is absent in the second. 
B. First and second joints of the antenne subequal in length. 
2. Dinocoris piceus. (Tab. V. fig. 4.) 
Pentatoma picea, Palis. Beauv. Ins. p. 148, Hém. t. 10. f. 3°. 
Dinidor unicolor, Hope, Cat. i. p. 25. 
Var. 
Dinocoris (Mecistorhinus) piceus?, Stal, En. Hem. ii. p. 8. 6”. 
Antiteuchus piceus, Dall. List Hem. i. p. 165. 6°. 
