BIONOMICS OF THE CHINCH BUG. 



11 



FIRST INSTAR. 



Fig. 2, a. 

 Head brown ; width, 0.235 mm. ; eyes dark red ; proboscis pale except tip 

 which is dusky ; antennal segments dusky, segment 4 of antenna about twice 

 the length of any one of the others, points of articulation pale. 



Fig. 2. — The chinch, bug : a, Nymph, first instar ; J) f nymph, second instar ; o, nymph, 

 third instar ; d, nymph, fourth instar ; e, nymph, fifth instar ; f, adult of long-winged 

 form ; g, tip of abdomen of adult female, ventral view ; h, tip* of abdomen of adult 

 male, ventral view. Greatly enlarged. 



Thorax 0.234 mm. in width ; legs pale., the tarsi distinctly two-jointed ; 

 pronotum brown and coriaceous over the whole surface, 0.104 mm. in length ; 

 mesonotum pale except the small coriaceous patch on either side of the meson, 



