136 HEMIPTERA-HETEROPTERA. 
CHELINIDEA. 
_ Chelinidea, Uhler, Proc. Ent. Soc. Philad. ii. p. 8365 (1863). 
Xiphares, Stal, Ofv. Vet.-Ak. Forh. 1867, p. 551. 
This distinct and peculiar genus is at once recognized from all its congeners by the 
length of the head and that of the pronotum being equal, as in the Mexican species, 
or subequal in length as in the Nearctic form described by Prof. Uhler, which two 
species at present are alone recorded. The body is broad and ovate. 
1. Chelinidea tabulata. (Tab. XIII. fig. 17.) 
Gonocerus tabulatus, Burm. Handb. ii. 1, p. 311. 2°. 
Chelinidea tabulata, Stal, En. Hem. i. p. 181. 2”. 
Hab. Mexico 1? (Mus. Berol.), Puebla (Bilimek, Mus. Vind. Ces.). 
The specimen figured is a typical one, contained in the Berlin Museum. 
ACIDOMERIA. 
Acidomeria, Stal, En. Hem. i. p. 182 (1870). 
The head is triangular, a little longer than broad, with the central lobe prominent ; 
the apical angle of the corium is somewhat produced, and the apical margin sinuated ; 
the femora are armed with one or two spines beneath; and the body is subovate. 
Four species have been described by St&l as belonging to this genus—one from 
Uruguay, two from unknown localities, and the other from Mexico. It is probably 
a truly Neotropical genus. I know of no record of it from the Southern Nearctic 
Region. 
1. Acidomeria rustica. (Tab. XII. fig. 11.) 
Acidomeria rustica, Stal, En. Hem. i. p. 182. 1’. 
Hab. Mexico, Oaxaca}. 
The figure is from a typical specimen in the Stockholm Museum. 
MARGUS. 
Margus, Dallas, List Hem. i. p. 523 (1852) ; Stal, Ofv. Vet.-Ak. Férh. 1867, p. 549. 
Margus is distinguished from Acidomeria by the corium having the apical margin 
straight and the apical angle not produced. The nervures of the membrane are 
reticulated. This is another Neotropical genus, of which about a dozen species are 
known; three of these are found in Central America, of which one also extends its 
area to the Southern Nearctic Region. 
