IIEMIPTERA HETEROPTERA. 
163 
cmciamm. 
Astemmites, De Lap. — Lyg&*odes, Burm. — Caecigenae, Serv. Hist. Hem. 
xxxviii.265 — Caecigenia, Doucjl. and Scoll — Pyrrhocorida, Stal, Hem. 
Afr. iii. 1 — Pyrrbocorina, Stal, K. V. Ak. Handb. 1870, 90. 
A. Prothorax wiili concise and elevated sides. - 1. Pyrrhocorid.e. 
B. Sides of the prothorax not elevated. - - 2. Largid.e. 
The Pyrrhocoridae and the Largidqe may be considered as one family, 
which is divided by Prof. Stal into two subfamilies as follows: — 
A. Sixth ventral segment of the female fissured to the base. Largida. 
B. Sixth ventral segment entire in both sexes. - Pyrrhocorida. 
Serville arranges thus the genera of the two families: — 
PYRRHOCORIDA. 
Pyrrhocoridae, Fieb. Eur. Hem. 25. 
A. Eyes not petiolated. 
a. Body much elongated. First joint of the antennae 
half the length of the body; fourth much shorter 
than the third. - 
b. Fourth joint of the antennae as long as the third or 
longer. 
* Fourth joint of the antennae not or only a little 
longer than the third. 
f First joint of the antennae not longer than the head 
or than the second joint. Membrane of the fore 
wings with irregular veins and areolets. 
ff First joint of the antennae longer than the head. 
Membrane of the fore wings with longitudinal 
veins. ------ 
** Fourth joint of the antennae much longer than the 
third. 
f Anterior divisions of the prothorax large and tumid. 
|f Anterior divisions of the prothorax narrow. 
B. Eyes petiolated. - 
Mac roche rai a. 
Pyrrhocoris. 
Odoxtopus. 
Physopelta. 
Dysdercus. 
Ectatops. 
LARGI DA. 
A. Body oval, broad. Eyes not or but slightly petio* 
lated, not very prominent. - Largos. 
B. Body long, linear. Eyes much petiolated, very 
prominent. ----- Acixocoris. 
