310 



ELEMENTARY ENTOMOLOGY 



GG. Beak four-jointed. 

 H. Ocelli absent. 



/. Membrane of front wings with two large cells 

 at the base, from which arise about eight 

 branching veins. Red-bugs. PYRRHOCORIDAE 

 //. Membrane of front wings with one or two 

 closed cells at the base, and with no longitudi- 

 nal veins. Leaf-bugs. (Page 1 1 7) CAPSIDAE 

 HH. Ocelli present. 



/. Front legs fitted for grasping prey, the tibia 

 being armed with spines and capable of being 

 closed tightly on the femora, which are unusu- 

 ally stout. Damsel-bugs . . . NABIDAE 

 //. Front legs not differing from the others. 

 J. Body and legs very long and slender. 



Stilt-bugs BERYTIDAE 



JJ. Body not unusually slender. 



K. Tarsus two-jointed; wing-covers resem- 

 bling lace network. Lace-bugs. (Page 



117) TlNGITIDAE 



KK. Tarsus three-jointed. 



L. Membrane with four or five 

 simple veins arising from its base- 

 Chinch-bug family. (Page 1 20) 



LYGAEIDAE 



LL. Membrane with many forked veins 

 springing from a transverse basal 

 vein. Squash-bugs. (Page 121) 



COREIDAE 



FF. Antennae of five segments. 

 G. Dorsal portion of body flat. 



H. Tibia with few or no spines. Stink-bugs. (Page 



115) PENT ATOMI DAE 



HH. Tibia armed with rows of spines . CYDNIDAE 

 GG. Dorsal portion of body strongly convex. 



H. Prothorax rounded in front, nearly straight be- 

 hind ; lateral margin of scutellum with a furrow 

 in which the edges of the wing-covers fit when 

 closed. Negro-bugs . . . THYREOCORIDAE 

 HH. Prothorax not as above ; lateral margin of 

 scutellum without furrow. Shield-backed bugs. 



SCUTELLERIDAE 



BB. Wings membranous or sometimes leathery throughout ; beak arising 

 from the hinder parts of the lower side of the head. 



Suborder HOMOPTERA 



