8 



Life History 



The eggs are deposited on the surface of a grass or cane- 

 leaf, usually on the upper surface, in the groove of the niid- 

 rih of the leaf (Plate I, figs 8, 9). They are in clusters of from 

 2 or 3 to as many as 30, and quite regularlj^ arranged in rows, 

 (when hut a small numljer they arc in one roAv) and a little over- 

 lapping like shingles. They are flat, nearly circular, about % 

 mm. in diameter, verj' finely reticulated on both surfaces, slightly 

 yellowish with a slight iridescent hue which sliows more distinctly 

 after hatching. Just pre^^ous to hatching, the young larvae may 

 be seen coiled around inside the egg. They are conspicuous by 

 tlieir l)lack lieads; 



Freshly hatched larvae are 1.5 mm . long. They are pale greenish ; 

 head black; no markings on the other segments; tubercles and 

 hairs are conspicuous. 



2n(l Stage. — Al)0ut4mm.; pale green; head with black spot 

 at cluster of ocelli, a black dot in middle of each lobe in front; a 

 black dot at postero-ventral angle, a black line on margin 

 above it. 



3rd Stage. — About 7 mm.; pale green; head as before; a black 

 spot in each lateral lobe of cervical shield, a l)lack dot behind 

 each spot; on segment 3 tubercles ii are heavily black-margined 

 l)elow and in front. 



4th Stage. — About 12 mm.; all marks are more ct)nspicuous; 

 tlie dot and spot in each lobe of cervical shield are united; a 

 faint ol)li(pu' dash on each side above paraclypeus. 



5tli Stage. Aljout 20 mm.; the markings are tln' same as in 

 previous stage, and a faint black lateral margin to the cervical 

 .shield. 



6th Stage.— (Plate I, figs. 2-5). Full-grown, 27 mm. Head 

 rounded, slightl}^ bilobed, pale lutcous, upper part checkered with 

 angular slightly darker spots; a rounded black spot about the 

 middle of each half of face, two little oI)lique dashes a little above 

 these and near median line, the l)lack dot at postero-ventral angle 

 in earlier stages is no longer present; ocelli lilack, except the 

 lower posterior one; tips of mandibles l>lack; tips of antennae 

 brown. I>ody slender, cylindrical, uniform green, the dorsal 

 vessel edged by a more or less distinct, opaque, white fat-body, 

 the tracheae along sides show very distinctly through the integu- 



