103 
Burmeister on the Genus Myocoris. 
This group is composed of six genera, Zelus, Myocoris, Eua- 
goras, Notocyrtus, Arilus, Harpactor, which have many charac- 
ters in common, and may be described at once. These characters 
are exhibited in the antenna ?, the head , the upper side of the pro- 
thorax (which I nam e pronotum), and in the legs. 
The antennce are always formed of four joints, the length of 
which is nearly the same in all these six genera. The first joint 
is the longest, and has at its base a node, (tab. 11, fig. 6,) which 
seems to be a distinct joint, but it is only a continuation of the 
great joint. Between this first joint and the second, w-e may ob- 
serve a small globose joint, which is very inconspicuous in the 
smaller species, but evident in the larger; for instance, in Arilus 
serratus (Red. serratus, Fabr.) and others. These little joints, 
named by me articulating joints, are found between the larger 
joints of the antenna; in the whole group of land-bugs, but in 
many genera these joints are so small that we cannot see them. 
The second great joint is the shortest of all, two or three times 
shorter than the first, but of the same form. The third joint has 
often the length of the first, but sometimes it is shorter, and a 
little longer than the second. Very rarely I have observed this joint 
incrassated (in Zelus crassicornis, Man. of Entom. vol. ii. pp. 225, 
3, 1, and others), still more rarely I have found the first joint in- 
crassated at the end. The fourth joint may be distinguished from 
the third with difficulty ; but in many species the limits of both 
may be more evidently seen. Sometimes, if the third joint is 
short, the fourth is longer than the third ; but the fourth is shorter 
than the third, and a little longer than the second. 
The head is in all these genera horizontally porrected, but its 
form is sometimes globose (Myocoris, Notocyrtus ), sometimes 
more cylindrical with a short neck (Zelus, Euagoras, Harpactor), 
or long (Arilus). In this last genus the neck begins by degrees, 
in the others it is separated from the occiput, and constricted be- 
hind the head. The antennce are placed on the front, and behind 
them in many species (all of the genus Zelus, but not of Euagorus, 
the majority of the genus Arilus, but not of Harpactor ) we find 
two spines. The semi-globose eyes are placed on each side of 
the head, and beneath these, upon an elevation at the upper side, 
are the two ocelli (fig. 2). The rostrum arises from a tubercle 
between the antennce, and lies on the gida, reaching the pro- 
sternum between the fore-legs. The three joints forming it are 
very different, but the third is always the shortest, and the two 
others of equal length. 
The pronotum forms a trapezium, with dilated margins, which 
