104 
Dr. Hermann Burmeister on the 
is constricted before the middle, near to the fore-margin. A 
longitudinal furrow divides the pronotmn into four parts, of which 
the two anterior are rough, and the posterior bear in one genus 
four spines ( Zelus ). In the genus Notocyrtus its construction is 
very curious, for the hind division forms a great tubercle, which 
covers the fore-part of the scutellum ; in the genus Arilus some 
species have the same tubercle, covered with warts (ex. Aril, tu- 
berculatus , Red. tuberc. Gray, in Griff. Anim. Kingd. xv. pi. 91); 
other species exhibit a large comb ( Ar . serratus ) at the same 
place, and others, two longitudinal carince (ex. Zelus elevatus, 
Fabr.) 
The wings, longer than the body, have, as in all Reduvini, a 
marginal costal nerve, and another in the middle, forming a fork, 
between the twigs of which and the marginal costa we observe 
three irregular cells (see the figure). In all the genera the base of 
the upper wing, as far as the fork, is corneous, except in the genus 
Myocoris, in which the whole wings are membranaceous, and this 
circumstance affords the best character for this genus. 
The legs are in all the six genera uniform, elongated, slender, 
with very small three-jointed tarsi (fig. 3), and large unguiculi 
furnished with a tooth at the base (fig. 4). Some species of the 
genus Myocoris have many slender hairs covering the hinder 
tibiae, and in the genus Notocyrtus the same tibiae have the form 
of a spindle, that is, they are incrassated in the middle, and 
pointed at the ends. 
The characters of the genus Myocoris are as follows : 
Caput globosum, collo brevi instruction. 
Antennce filiformes, quadriarticulati. 
Rostrum breve geniculatum, articulo primo et secundo aequa- 
libus. 
Alee 4 omnino membranaceae. 
Pedes elongati, graciles ; tibiis subaduncis, apice oblique trun- 
catis ; tarsis triarticulatis, minutis ; unguiculis dilatatis, basi 
dente unico instructs, subbifidis. 
I am acquainted with ten species of this genus, of which nine 
are inhabitants of Brazil, and one of Sumatra. 
A. Caput bicorne. 
a. Caput pallidum. 
1. M. gilvus, Klug. 
Totus testaceus ; antennis, fascia inter oculos, oculis, elytrormn- 
que membrana nigris. Long. 5 ". 
