12 HEMIPTERA-HOMOPTERA. 
sides below these markings there is a space which is more or less broad and reddish 
or yellowish, the colour being in some specimens slightly marked, while in other cases 
it extends over a great part of the pronotum; the abdomen and legs are sometimes 
bright red and sometimes black or dark ferruginous. 
I have, with some hesitation, assigned all the specimens before me to E. quadricolor ; 
at first I was inclined to refer them to E. curvicornis, but Walker’s type in the British 
Museum is immature and has the horn broken off, and it is almost impossible to identify 
it with any accuracy. We figure a typical #. guadricolor from Chilpancingo, and one 
of the var. with pronotal horn from Guatemala city. 
10. Enchenopa apicalis. 
Membracis apicalis, Stal, Stett. ent. Zeit. xxv. p. 68 (1864) ’. 
Enchenopa apicalis, Stal, Ofv. Vet.-Ak. Férh. 1869, p. 273 *. 
Hab. Mexico! 2 (coll. Signoret, in Mus. Vind. Ces.). 
This is a small dark species, with the apex of the tegmina hyaline and the tarsi 
pale; superficially it resembles a Zropidoscyta rather than an Enchenopa, but Stal is 
probably right in including it in the latter genus. 
11. Enchenopa (Campylenchia) nutans. (Tab. I. figg. 18, 18 a *.) 
Membracis nutans, Germ. Mag. der Ent. iv. p. 28*; Revue Silb. ili. p. 227°. 
Enchenopa nutans, Stal, Ofv. Vet.-Ak. Férh. 1869, p. 271°. 
Hab. Panama, Bugaba, Caldera, and David (Champion).—Brazit ? ?. 
This species is allied to E. curvata, which is regarded by Stal as synonymous with 
the following species of Walker (List of Homopt. Ins. ii. pp. 488-491)—. antonina, 
E. venosa, E. densa, E. frigida, and E. bimaculata ; the subgenus bears much the same 
relation to Enchenopa proper as Argante bears to Aconophora. . nutans belongs to 
Stal’s subgenus Campylenchia (Kongl. Sv. Vet.-Ak. Handl. Band viii. 1, p. 43). A 
specimen from Caldera is figured. 
| | ‘TROPIDOSCYTA. 
Tropidoscyta, Stal, Kong]. Sv. Vet.-Ak. Handl. Band viii. 1, p. 44 (1869). 
Membracis, Germar, Rev. Silb. iii. pp. 228 ete. (ex parte). 
This genus was formed by Stal to include Membracis pecila, Germ., and other allied 
species; they are small inconspicuous insects: in several points they are closely akin 
* It may be noticed that in some of the figures the antennal sete are not represented; they are probably 
always present in the living insect, but are extremely easily rubbed or broken off, and are therefore absent 
in the majority of preserved specimens. It is possible that good characters may eventually be found in their 
position ; in some of the larger species of Membracis they seem to be situated in distinct scrobes, (Vide Tab. I. 
figg. 1, 2.) 
