810 Journal of Agricultural Research vol. vi.no. 21 



ings on it plainly visible. The longitudinal stripes arranged as in preceding de- 

 scription, the color of the lines becoming intermixed and less distinct; the white 

 spiracular stripe just below the line of spiracles with an interrupted ocherous line, 

 not observed in preceding instar. The general body color is pale greenish on tho- 

 racic segments, the remaining segments gradually changing to pale yellowish brown. 

 Spiracles black, surrounded by rather conspicuous whitish areas.tliose on prothoracic 

 and proanal segments largest. 



Measurements, average of two individuals, just after third molt: Length of body 

 10.7 mm., width of prothoracic segment 1.47 mm., of anal segment 1.28 mm., of head 

 1.45 mm. Just before fourth molt: Length of body 15.0 mm., width of prothorax 

 1.86 mm., of anal segment 1.55 mm., of head 1.47 mm. 



Fifth instar (just after fourth molt). — Head as described for previous instar. 

 Ocelli become more distant with growth of head, the posterior one of the two near 

 base of antenna reduced to an inconspicuous spot, much resembling a seta spot. 

 The longitudinal stripes on abdomen as in preceding instar, except that just below 

 the line of spiracles is a narrow white line followed by another rather narrow line 

 of reddish burnt umber, the underside of body cream-colored or with faint greenish 

 tint; dorsal surface appearing mottled with brownish markings on pale or cream- 

 colored background. The median slit of spiracle is more conspicuous and shows 

 as a paler whitish area. Otherwise as in preceding instar. 



Fifth instar (nearly full-grown fifth-instar larva while feeding). — The entire 

 body from dorsal view a dirty greenish color with pink tint, the former darkest near 

 central portion of body and along median dorsal lines and the latter more promi- 

 nent at the extremities, obliterated by the dull-green coloration of the dorsum. 

 Below the line of spiracles is a pale pinkish green longitudinal line bordered on 

 either side by a narrow whitish line, above and below which the more or less mot- 

 tled dusky-green color predominates. ' Spiracles as before, but of a more velvety 

 black. Legs as before, but the pseudolegs with dusky encircling bands at extreme 

 base visible when legs are fully extended. Otherwise as previously described. 



Fifth instar (just before fifth molt). — Head and prothoracic segments of same 

 general appearance as in preceding instar just before molting. From a dorsal view 

 the general color is pale yellowish green to cream, the longitudinal lines being very 

 faint with no definite outline. The broad longitudinal dark stripe just above line 

 of spiracles contrasts strongly with the whitish or cream-colored area below the 

 spiracles. Other markings as in preceding instar. 



Measurements, average of two individuals, just after fourth molt: Length of body 

 13.85 mm., width of prothoracic segment 2.13 mm., of anal segment 1.64 mm., of 

 head 2.30 mm. Nearly full grown and while feeding: Length of body 20.7 mm., 

 width of prothoracic segment 2.59 mm., of head 2.44 mm. Just before fifth molt: 

 Length of body 20.55 mm., width of prothoracic segment 2.90 mm., of proanal seg- 

 ment 2.32 mm., of head 2.38 mm. 



Sixth instar (about full grown, PI. CVII, D, but still feeding). — Head reticu- 

 lated and mottled as before, but median suture with border of dark raw umber. 

 Cervical shield more prominent and shining, covering almost the entire dorsum 

 of the prothoracic segment. General color from dorsal view dirty-pale brown, paler 

 at posterior third. The general color varies in different individuals, some being 

 very pale while others appear very dark and in some cases even almost black. At 

 the beginning of this instar the general color was pale with a distinct pinkish tint 

 and the median-dorsal area was dull green, the pinkish shades predominating at 

 the posterior extremity. A median dorsal and two conspicuous white lines laterad 

 on dorsum of prothorax, each of the latter bordered on its inner side by a narrow 

 dark -brown area. These white lines are extensions of longitudinal lines extending 

 the length of the body, but are much more prominent and distinct on the prothoracic 

 segment. The median dorsal line or stripe dark brown, its median interrupted at 



