HETEROPTERA. — GALGULID&. 463 
section, Amphibicorisa, an inappropriate name, because the species 
never reside iz the water. In order to retain the section in its ex- 
tent so well characterised by Latreille, and, at the same time, to 
avoid his misnomer, I have proposed for them the name of AuRoco- 
RISA, or such as live in the open air. From the Hydrocorisa they are 
ordinarily distinguished by the greater length of the antennz, which 
are not minute, and concealed in cavities beneath the eyes; and by 
the legs, fitted for running or walking, and not for swimming. At 
the same time, however, as if to show the impossibility of confining 
nature within the limits of our arrangements, the Galgulide (which 
have hitherto been arranged with the Hydrocorisa, but which differ 
therefrom in not residing in the water), as well as the genus Pelogo- 
nas, have the antennz minute, and concealed in cavities beneath the 
eyes; whilst Aphelocheirus still more nearly approximates to Nau- 
coris, in being truly aquatic, whilst the elongated structure of its ros- 
trum proves its decided affinity to Pelogonus and Acanthia. It is 
always amongst these osculant but highly interesting groups that the 
systematist is baffled. 

The third family, GALGULID2, or the first of this section (jig. 119. 
19. Galgulus oculatus, North America), consists of very few species, dis- 
tinguished by the cursorial structure of the hind legs ; the short, broad, 
and depressed form of the body ; broad head, with pedunculated eyes ; 
short rostrum (fig. 119. 21. head sideways), and small antenne, in- 
serted in a cavity beneath the eyes, and composed of four joints 
(fig. 119. 20.), the third of which is small, and has been overlooked 
by some authors; the fore legs are more or less raptorial, consisting of 
a broad or very broad femur, slender tibia, and a tarsus consisting, in 
Galgulus, of a single joint furnished with two long slender ungues, but 
formed, in Mononyx, into a slender curved hook without ungues ; the 
fore feet, in this genus, being more pre-eminently raptorial than in 
Galgulus; the other tarsi are 2-jointed, with two ungues ; the two ocelli 
are minute, and placed on the front of the face, between the eyes. 
The form of the fore feet and the pedunculated eyes clearly show 
that the insects of this family are predatory, feeding upon other in- 
sects; whilst the presence of ocelli, and the structure of the hind 
legs, indicates them to be cursorial, and not natatorial ; it is, accord- 
ingly, upon the margin of water that these insects are stated to 
