CLASSIFICATION 53 



H. Wing covers with cuneus. Membrane with one 

 or two closed cells at its base, otherwise without 

 veins Capsidae. 



HH. Wing covers without cuneus. Membrane with 

 four or five simple or anastomosing veins arising 

 from the base; or with a large number of veins 

 arising from a cross vein at the base. 



I. Ocelli wanting; membrane with two large cells 

 at the base, and from these arise about eight 

 branching veins Pyrrhocoridae. 



II. Ocelli usually present. 



J. Head with a transverse incision in front of 

 the ocelli, which are always present. .Berytidae. 

 JJ. Head without transverse incision. 



K. Membrane with four or five simple veins 

 arising from the base of the membrane; the 

 two inner ones sometimes joined to a cell 



near the base Lygaeidae. 



KK. Membrane with many, usually forked 

 veins, springing from a transverse basal vein. 



Coreidae. 

 D. Antennae five- jointed. 



E. Scutellum nearly flat, narrowed behind. 



F. Tibiae unarmed or furnished with very short spines. 



Pentatomidae. 

 The Principal Families of the Homoptera. 



A. Beak evidently arising from the head; tarsi three-jointed; an- 

 tennae minute, bristlelike. 



B. With three ocelli, and the males with musical organs. Usually 

 large insects, with all the wings entirely membraneous. 



Cicadidae. 

 BB. Ocelli only two in number or wanting; males without musi- 

 cal organs. 



C. Antennae inserted in front of and between the eyes. 



D. Prothorax not prolonged above the a:bdomen. 



E. Hind tibiae armed with one or two stout teeth, and the 

 tip crowned with short stout spines Cercopidae. 



