292 



ELEMENTARY STUDIES IN INSECT LIFE 



HEMIPTERA. 



A. Front of head not touching the coxse ; distal portion of wing 

 generally thinner than basal part. (Hcteroptera.) 



B. Antennae as long as the head at least. Terrestrial Heter- 

 optera excepting one family, Hydrobatidse. 

 C. Last segment of tarsi more or less split; claws arising 

 from side of tarsi. 



D. Body usually elongate ; beak four-jointed ; tarsi two- 

 jointed. Second and third pair of legs unusually long. 



Hydrobatidae. 

 (Water-Striders.) 



CO. Last segment of tarsus entire; claws arising from end 

 of tarsi. 

 D. Antennae four-jointed. 



E. Wing-covers resembling network ; tarsi two-jointed. 



Tingitidae. 



(Lace-Bugs.) 



EE. Wing-covers of various forms or rudimentary, but 

 not resembling lacework. 



F. Beak three-jointed, curved. Front femora some- 

 what thickened. Reduviidae. 



(Assassin-Bugs.) 

 FF. Beak four-jointed. 



G. Ocelli present. 



FIG. 219. Wing of Coreidae, 

 showing venation. (After 

 Comstock.) 



FIG. 220. Wing 

 venation of Ly- 

 gieidae. (After 

 Comstock. 



FIG. 221. Wing vena- 

 tion of Capsidse. (After 

 Comstock.) 



H. Antennae inserted on upper part of head; 

 venation of wing according to figure. 



Coreidae. 

 (Squash-Bugs.) 



HH. Antenna? inserted well down on side of head; 

 venation of wing according to figure. 



Lygaeidae. 



(Chinch-Bugs.) 



GG. Ocelli wanting; venation of wing according 



to figure. Capsidae. 



(Leaf-Bugs.) 



