XXX VI 



i:?flEODUCTIOW. 



Si/nojms of the Suborders of Ehynchota. 



Front of head not touching the coxoe . . HETEROPTERA. 

 Pront of head much indexed so as to be 



in contact with the coxae HOMOPTERA. 



Synojitsis of the Families of the Heteroptera. 



Skkies I. Antennae conspicuous, capable of 

 beinj; moved about freely iu front 



of head 



1. Abdomen not clothed beneath with a silvery 

 velvety pubescence. (Species not aquatic.) 

 A. Scutellum reaching at least to the base 

 of the membrane, or at least half as long- 

 as the abdomen, sometimes covering' the 

 whole of the abdomen above and the anal 



appendages , . . . . 



J). Scutellum not reaching to the base of 

 membrane, nor to middle of abdomen, 

 a. Mesopleurte and metapleurfe composed 

 of one piece only ; hemelytron without 

 a cuneus. 

 a. Tarsi three-jointed. 



ft', liostrum not bent at the base, lying 



in repose against the under surface 



of the head. 



cr. Antennae generally elongate and 



four-jointed, inserted on the 



upper parts of the sides of the 



head. 



«'. Legs of moderate length ; 



apices of femora not nodu- 



losely clavate 



h^. Legs long and slender ; apices 



of femora nodulosely clavate . 



6^, Antennae inserted below a line 



drawn from the centre of the eye 



to the apex of the face. 



«*. Ocelli present 



i*. Ocelli absent 



J\ Rostrum stout, bent at the base, so 

 that in repose it does not lie 

 against the under surface of head. 

 ((-. Rostrum long ; ocelli placed 



between the eyes 



b~. Rostrum short ; ocelli, when 

 present, placed behind the eyes. 

 b^. Ilemelytra complete, mem- 

 brane distinct 



GYMNOCERATA. 



Pentatomidae. 



Coreidae. 

 Berytidae. 



Lygaeidae. 

 Pyrrhocoridae. 



Saldidae. 



Reduviidae. 



