248 On the Morphology and Classification. of Rhynchota. 
varying in shape and size; in Anthocoris it is short and 
straight; in the two other genera long and curved; in Acan- 
thia it is raised in the shape of a leaf directed backwards, 
and receding as far as th suture of the mesonotum. In Myr- 
must exist at least in some of them. Corixæ are more par- 
ticularly accompanied by a very perceptible bug-smell, and I 
have convinced myself that the odoriferous glands exist in 
them; but I have not succeeded in finding their external 
openings. 
VII. 
n accordance with the preceding considerations, I propose 
the rien classification :— 
I. Gens excavats, coxas pee RUNE 
[C oxæ postice cardi li libus instruct. | 
n HOMOPTERA. 
II. Gene integre, a coxis remote. 
Subordo HETEROPTERA. 
A. Coxe postice acetabulate, rotatorim, scrobieulis femo- 
ralibus nullis : Trochalopoda. 
a. Epimera metathoracica laminata, segmentum primum 
inis ob antia. 
1. Antenne basi obtecte. Fam. 1. Cimices. 
2. Antenne totee detecte. 
* Antenne preoculares. Fam. 2. Corez. 
** Antenne infraoculares, Fam. 3, Lygei. 
b. Epimera metathoracica lamina ventrali carentes. 
1. Unguiculi superpositi. Fam. 4. Hydrometre. 
2. Unguiculi terminales. 
* Epimera metathoracica maximam partem epimeris 
mesothoracicis obtecta. peu abdominalia 
ultimi paris siphuneulata. Fam. 5. Nepe. 
** Epimera metathoracica tota detecta. Spiracula 
abdominalia zqualia. Fam. 6. Reduvii. 
