$22 HEMIPTERA-HETEROPTERA. 
Hab. Panama, Boquete in Chiriqui 3500 feet (Champion). 
One specimen. Easily distinguishable by the opaque elytra, with fine lines of 
glistening silvery pubescence, the stout antenne, with the third joint wholly ochreous, 
the small eyes, &c. 
MACROTRACHELIELLA, n. gen. 
Head as long as the pronotum, the basal portion rather long and cylindrical and forming a continuous outline 
with the narrow apex of the pronotum; eyes small in the female, larger in the male, and distant from 
the front of the pronotum, the ocelli placed a little behind them; rostrum short, not reaching the anterior 
cox; antenne moderately elongate, rather slender, joints 3 and 4 more slender than 2. Pronotum 
immarginate at the sides, with a short collar in front; the anterior lobe narrow, convex, and subconical ; 
the posterior lobe short, wide, and raised, rapidly and obliquely narrowing forward, and rather deeply 
arcuate-emarginate behind ; the lateral angles produced into a short outwardly-projecting tooth. Scutellum 
transversely sulcate beyond the middle, the apical portion flattened. Elytra with a narrow linear embolium, 
the membrane not hyaline externally, and with a single prominent nervure. Mesosternum greatly 
developed, convex, with a short keel-like projection in the centre in front. Metasternum very short. 
Anterior cox narrowly, the two other pairs very widely, separated. Orifice of the metastethium carinate 
in front, long, and curving round externally to the anterior border of the metastethium. Legs slender, 
the femora moderately thickened. Body oblong, smooth, clothed with a few scattered erect hairs. 
In this curious genus the anterior lobe of the pronotum is narrow and subconical, its 
apex forming a continuous outline with the cylindrical, prolonged basal portion of the 
head; the lateral angles of the pronotum are dentiform; the embolium is reduced 
to a narrow linear strip at the sides; and the entire surface is smooth and shining. 
It is nearest allied to Macrotrachelia, but differs from that genus in the relatively 
narrower anterior lobe of the pronotum, the very short metasternum, the unicolorous 
membrane, &c. 
1. Macrotracheliella levis, n. sp. (Tab. XIX. figg. 21, g; 22,224, 9°.) 
Very shining, black, the suture of the elytra and the base of the tarsi more or less flavescent, the third and 
fourth antennal joints ochreous, the membrane narrowly pale along the cuneal suture; clothed above and 
beneath with a few scattered erect: hairs, some of which project beyond the apex of the abdomen, the 
antenne sparsely pilose. Antenne with joint 1 extending as far as the apical process of the head, 2-4 
almost equal in length, 2 nearly three times as long as 1 and thickened towards the tip. 
Length 23-24 millim. (¢ 9.) 
Hab. Mexivo, Teapa in Tabasco (H. H. Smith: 3); Panama, Bugaba, Volcan de 
Chiriqui (Champion: 2). 
Two females and one male. In the Teapa male the suture of the corium only is 
flavescent, but in one of the Chiriqui females this colour extends forward along the 
claval suture to a little beyond the apex of the scutellum. The third example, trom 
Bugaba, is of a rufo-piceous colour, due no doubt to immaturity. 
