HEMtPTERA HETEROPTERA. 



165 



JJ Head not deflexed. Male. — Anal segment of 



moderate size. Female. — Sixth veutral seg- 

 ment truncated, not elongated. 

 § Outer border of the corium much longer than the 



suture of the clavus. 

 X Third and fourth joints of the antenna) not nearly 



of equal length. - 



X X Third and fourth joints of the antennae equally 



long or nearly so. - 

 §§ Outer border of the corium and suture of the 



clavus nearly equally long. 

 X Third and fourth joints of the rostrum as long as 



the second or a little longer. 

 XX Third and fourth joints of the rostrum much 



longer than the second. 

 o Head not received into the prothorax as far as the 



eyes. - 



o<> Head received into the prothorax as far as the 



eyes. - 



** Fore wings sometimes abbreviated aud without 



a membrane; apical border of the corium 



rounded, 

 f First joint of the rostrum longer than the head. - 

 •f-f First joint of the rostrum shorter than the head. - 

 bb. Fore wings abbreviated, truncated. 



The above author uses the following method in Kongliga Svenska 

 Vetenskaps-Akademiens Handlingar, 1870: — 



Roscius. 

 Melamphaus. 



Odontopus. 



DlNDYMUS. 



Dysdercus. 



Pyrrhocoris. 



scantius. 



Dermatirnes. 



LARGINA. 



A. Head with no longitudinal furrow beneath. 



a. Hind part of the head between the eyes trans- 

 versely concave or nearly flat. 



* Fore coxa; armed with a spine. - - - 

 ** Fore coxae unarmed. 



■\ Eyes much peliolated. - - - - 



f-f Eyes slightly peliolated or sessile. 



\ Body oblong or narrowly oval. - 

 \\ Body narrow, linear. 



§ Head excavated between the shoi t-petiolated eye. 

 §§ Head flat between the sessile eyes. 

 I). Head convex above and beneath. 



B. Head with a longitudinal furrow beneath. 



a. Fust joint of the antenna; longer than the head 



ami ihe thorax together. - - - 



b. First joint of the antenna' not lunger than the 



head and the thorax together. 



* Fore area of the prothorax remote from the fore 



border. - 



** Fore area of the prothorax extending to the fore 

 border. ..... 



Fibrenus. 



ASTEMMA. 



Largus. 



Theraneis. 



Stenomacra. 



Arhaimie. 



m.w kociieraia. 



Iphita. 

 Physopelta. 



