HEM IP TERA % 
125 
Classification of the Heteroptera. 
(For adva 7 iced students.) 
In order to use the following table for determining the families of 
bugs, the student should become familiar with the names applied to 
different parts of the fore-wings of these insects. The thickened 
basal portion is composed of two pieces joined together at their 
sides; one of these is narrow and is the part next 
to the scutellum when the wings are closed (Fig. 
141, cl)\ this is distinguished as the clavus (claVus). ( “ 
The other broader part is the corium (co'ri-um) fig. i 4 t.— Diagram of 
(Fig. 141, co). The terminal portion of the wing- £ug g cover of a 
cover is designated as the membrane (Fig. 141, ?n.) 
In certain families a triangular portion of the terminal part of the 
corium is separated as a distinct piece; this is the cuneus (cu'ne-us) 
(Fig. 141, cu). In certain other cases, a narrow piece on the costal) 
margin of the corium is separated by a suture; this is the embolium 
(em-bo'li-um) (Fig. 141,1). 
Fig. 145. Fig. 146. Fig. 1*7. 
Pyrrhocoridce . Lygee id a. Core idee. 
TABLE FOR DETERMINING THE FAMILIES OF THE 
HETEROPTERA. 
A. Antennae shorter than the head, and nearly or quite concealed in 
a cavity beneath the eyes. 
B. Hind-tarsi without claws. 
C. Fore-tarsi flattened with a fringe of hairs on the edge, and 
without claws ; head overlapping the prothorax, p. 129. 
Corisidje. 
CC. Fore-tarsi of the usual form, and with two claws; head in¬ 
serted in the prothorax, p. 130. NotonectiDjE. 
