DEVELOPMENT OF THE HOPPERS 13 
FIRST INSTAR. (PLATE II, FIG. 2.) 
Length of nymph on day of hatching Be) 515615. mim. 
Length of antennze sees “i 
Number of segments to acne 528 
The structure of the antenne (see Plate VIII, Fig. 8) is worthy 
of note. Segments 3-7 are subequal in Jength and triangular in section. 
Segment 2 is short, cylindrical. Segment 1 is almost triangular in 
outline. Segment 8 is very long, almost as long as the five preceding 
segments together. 
The ground colour is greyish mottled with brown. A pale yellow 
band extends from the base of the antenna, beneath the eye across the 
cheek, along the ventral margin of the pronotum over meso- and meta- 
pleure on tothe femur of the hind leg. A distinetly paler band runs 
along the dorsum from the anterior to the posterior end of the insect. 
The general shape is much as in the adult insect. There is, however, 
yet no sign of elytra and the thorax is not at all enlarged. 
SECOND INSTAR. (PLATE II, FIG. 3.) 
Length of body a) Ju. t= fo mm. 
Length of antennae w. 2— WIT 
Number of segments to FANS ... 9—10 
The new segments have been divided off from the base of the 
terminal club (see Plate VIII, Fig. 9). The divisions are usually still 
incomplete and may be absent entirely, in which case the antennz have 
the same number of segments as in the first instar. 
The general colour is somewhat paler than in the first instar, 
especially along the sides of the thorax and abdomen, so that the dorsal 
band is much less distinctly marked off. The depth of colour varies, 
however, so that it cannot be used as a distinguishing character. The 
chief distinguishing features are (a) increase in size of shaft of antenne 
relative to terminal club, (b) the beginning of division in club, (c) the 
srowth of the external sexual organs (vide infra). 
THIRD INSTAR. (PLATE I, FIG. 4.) 
Length of body Be, ... 12—14 mm. 
Length of antennee Bee 4— 4°5 ,, 
Number of segments to paroamen ... 1O—12 
The two basal divisions in the club have usually become distinct, 
while divisions have appeared in segments 6 and 7 and a further divi- 
sion may at times be noted in segment 3. 
The terminal club, which in the first instar is about the same 
length as the five preceding segments combined, is now not much more 
than half their combined length. 
The colour 1S) Ut many specimens, the same as that sinseae 

. 1 One iach =25 millimetres (mm. Ms 
