256 HEMIPTERA-HETEROPTERA. 
6. Zelus pallens. 
Euagoras pallens, Herr.-Schaff. Wanz. Ins. viii. p. 46, t. 264. fig. 819°. 
Zelus pallens, Stal, Enum. Hemipt. ii. p. 89°. 
Hab. Mexico, Orizaba (Bilimek, in Mus. Vind. Ces.).—Braziu }?. 
In the Vienna Museum collection there is a female specimen of a Zelus from 
Orizaba, as well as a larva of the same species, standing under the name Z. pallens. 
This insect is stramineous in colour, and agrees very fairly with Herrich-Schaffer’s 
figure. It has a less elongate head than either Z. cervicalis or Z. pictipes, and the 
post-ocular portion is much more narrowed behind. The larva is not unlike that of 
Z. pictipes, except that the abdomen is without lateral spines and the head is short. 
7. Zelus ruficeps. (Tab. XV. fig. 15, ¢.) 
Zelus ruficeps, Stal, Stett. ent. Zeit. 1862, p. 453°. 
Zelus (Diplodus) ruficeps, Stal, Enum. Hemipt. ii. p. 90’. 
Hab. Mrxico!? (Sallé), Orizaba (Bilimek, in Mus. Vind. Ces.), Jalapa (Hoge), 
Atoyac (H. H. Snvith, Schumann), Teapa (Hf. H. Smith); Guatemaa, Senahu, Panima, 
and Chiacam in Vera Paz, El Tumbador, Las Mercedes, Cerro Zunil, Volcan de 
Atitlan, Zapote, Capetillo, Aceituno (Champion); Panama (Boucard), Volcan de 
Chiriqui (Champion). 
As noted by Stal, there are three well-marked forms of this species: one (a) with 
the posterior lobe of the pronotum entirely pale ; one (0) with a transverse black patch 
on this part; one (c) like the latter, but with the clavus and corium, the outer margin 
of the latter, and sometimes the apex also, excepted, blackish. The black fascia on the 
anterior lobe of the pronotum is variable in size, sometimes extending over the greater 
part of the disc. The males have the terminal genital segment emarginate at the apex 
and armed with a long, slender, upwardly curved spine. The females usually have the 
hind tibie slightly thickened on the inner side for some distance before the middle (as 
in the same sex of Z. janus), but this is not always the case. The third antennal joint 
is slender in both sexes. A specimen from the Volcan de Chiriqui is figured. 
8. Zelus grassans. (Tab. XV. fige. 16, ¢; 17, 2.) 
Zelus grassans, Stal, Stett. ent. Zeit. 1862, p. 450 ( 9)’. 
Zelus (Diplodus) grassans, Stal, Enum. Hemipt. ii. p. 91°. 
Hab. Mexico? (coll. Signoret!, in Mus. Vind. Ces.: 2), Milpas in Durango, 
Mazatlan (Forrer: 3 2); Guatemana, San Gerénimo (Champion: ¢ ). 
The type of this species (now before me) is a female, and we have received three 
others of the same sex from Mexico agreeing perfectly with it. The five males obtained 
by Forrer and myself have the lateral angles of the pronotum much less acute, the 
