340 PHYLUM ARTHROPODA. 
Appendages.—Insects feel their way, test food, and 
apparently communicate impressions to one another, by 
means of the antenne. Then follow the mandibles, first 
A 
at 
SSOaS 
4s 
Be 
$65 
1 
i 
q 
Fic, 182.—Mouth-parts of mosquito.—After Nuttall and Shipley. 
4., labium ; 7.Z., maxillary palps; cé., clypeus; cs., head scales. 
a., Antennz ; Zre., labrum and epipharynx ; 7., mandibles ; 4., hypopharynx 3 #x., first maxillz ; 
maxillz, and second maxille, on the head; the three pairs 
of legs on the thorax; and sometimes vestiges of legs on 
the abdomen. 
