HEMIPTERA HETEROPTERA. 



163 



cmcigenm. 



Astemnrites, De Lap. — Lygaeodes, Burm. — Caecigenae, Serv. Hist. Hem. 

 xxxviii.265 — Caecigenia, Dougl. and Scott — Pyrrhocorida, S(al,Hem. 

 Afr. iii. 1 — Pyrrhocorina, Sta'l, K. V. Ak. Handb. 1870, 90. 



A. Prothorax with concise and elevated sides. 



B. Sides of the prothorax not elevated. 



1. Pyrritocorid^;. 



2. L.ARGID.E. 



The Pyrrhocoridae and the Largidae 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: — 



PYRRHOCORIDiE. 

 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 aieolets. 

 tf First joint of the antenna- longer than the head. 

 Membrane of the fore wings with longitudinal 

 veins. --.--. 

 ** Fourth joint of the antenna? much longer than the 

 third. 

 ■f Anterior divisions of the prothorax large and tumid, 

 f f Anterior divisions of the prothorax narrow. 



B. Eyes petiolated. - 



Macrocheraia. 



Pyrrhocohis. 

 Odoxtopcs. 



Phtsopelta. 

 Dysderoos. 



ECTATOPS. 



LARGIDA. 



A. Body oval, broad. Eyes not or but slightly petio- 



lated, not very prominent. ... I.WtGUS. 



B. Body long, linear. Eyes much petiolated, very 



prominent. ..... Acixoconis. 



