258 HEMIPTERA-HETEROPTERA. 
Var. a. The femora each with the extreme apex and two narrow more or less complete annuli, and the hind 
tibia sometimes with an annulus at about one-third from the base, black. (6 9.) (Fig. 20.) 
Hab. Mexico, Tepic (Schumann), Guadalajara (Hoge), Amula, Cuernavaca (H. H. 
Smith). 
Var. 3. Black, the lateral and basal margins of the pronotum rufo-testaceous, the connexival margins and a 
space down the middle of the venter to the apex dirty yellow; the legs in great part black. (¢.) 
Hab. Muxico, Amula (H. H. Smith). 
A very variable insect. The variety «, of which we have received eleven specimens 
from Western Mexico, looks, at first sight, distinct. In the typical Z. janus the 
anterior and ‘intermediate femora have each a narrow ring at about one-third from the 
apex, and the apex of the hind pair broadly, black, the hind tibie usually with a broad 
black ring below the base; in some examples the hind femora have only a narrow 
black ring before the apex and the intermediate pair are immaculate. The form of 
the spine at the lateral angles of the pronotum is variable. The males have a long 
curved spine at the apex of the terminal genital segment; the females have the hind 
tibie thickened on the inner side for some distance before the middle. The third 
antennal joint is slender in both sexes; the first joint varies in length. The types of 
Stal’s insects have been seen. 
11. Zelus sulcicollis, n. sp. (Tab. XV. fig. 21, 2.) 
Q. Elongate, rather robust, slightly shining, thickly pubescent and also clothed with pallid erect hairs; 
fusco-testaceous, the post-ocular portion of the head blackish, a median line or spot in front excepted, the 
dorsal surface of the abdomen and a transverse fascia on each of the connexival segments blackish, the 
corium and clavus reddish in one specimen, the membrane smoky; the intermediate and hind femora 
sometimes slightly infuscate at the apex and with indications of a dark ring before the tip; the antenne 
rufo-testaceous, with the first and second joints narrowly infuscate at the apex. Head nearly as long as 
the pronotum, narrowing posteriorly, the basal portion stout and cylindrical; antenna as long as the 
body, the first joint reaching to a little beyond the base of the pronotum. Pronotum sulcate down the 
middle from the apex to halfway down the posterior lobe, the latter flattened and moderately dilated at 
the sides posteriorly, the hind angles armed with a short triangular tooth ; the anterior lobe smooth, the 
posterior lobe feebly rugulose, the basal margin reflexed, the anterior angles transversely tuberculiform. 
Elytra extending to a little beyond the apex of the abdomen. Legs elongate, comparatively stout, 
pilose; the anterior femora incrassate and as long as the hind femora, the intermediate pair moderately 
thickened. 
Length 19-21, breadth 44-5 millim. 
Hab. Mexico, Tepic (Schumann), Omilteme in Guerrero (H. LH. Smith); GuaTEMALA, 
San Gerdnimo (Champion). 
Four specimens, all females. Chiefly recognizable by the pilose body, the long 
pronotal sulcus, and the incrassate anterior femora. The second joint of the rostrum 
is much longer than the first. The tooth at the hind angles of the pronotum is short, 
acute, and triangular. Z. swlcicollis is nearest allied to Z. janus, Stal, but differs from 
it in the more thickly pilose body, the stouter legs (the anterior femora especially), 
