THE GRAPE-LEAF SKELETONIZER. 83 
Sixth instar (full-grown larva) (fig. 14).—Cylindrical and uniform 
in shape, color deep sulphur-yellow. Head oval-pyramidal in form, 
dark brown, lighter above, retractile, concealed beneath first pro- 
thoracic segment. Mandibles and maxille dark brown, maxillary 
palpi yellow, translucent, eyes black. Tubercles flat, wartlike areas, 
appearing to naked eye as a transverse, me- Wy, 
dian row of black dots. Under a 4-inch |M Wl 
objective, tubercles wartlike, covered with 
short, thick, segmented, white bristles tipped 
with black, joints and bulb at base of bris- 
tles dark colored (length, 0.20-0.33 mm.). 
Tubercles arranged: I, subdorsal; II and 
III, lateral; III, just above spiracle; IV, 
substigmatal; V, above base of leg. Sub- 
dorsal tubercles confluent on segment 2. 
Segments 5-14 with tubercle III wanting, 
segments 7-14 with tubercle V wanting, 
subdorsal and lateral tubercles confluent on 
segment 13, subdorsal tubercle confluent on Y 
segment 14, the rest wanting. Anterior and 16. 15." The ee 
posterior segments dorsally and all segments — cana): Cocoon. Enlarged. 
laterally with a number of long, whitish,  ‘0'"®” 
segmented hairs, variable in length. Spiracles round, light brown, 
present on first prothoracic and on all abdominal segments except 
anal, the one on segment 13 smaller than the rest. Thoracic feet 
translucent, yellow, small, pointed, with a single black claw at tip 
and also a few hght-colored hairs on sides. Abdominal 
feet pale yellow, apex with a row of small, black, bristle- 
hike claws. Length, 11-13.5 mm.; width of head, 1.483- 
1.666 mm. (variable). 
COCOON. 
Cocoon (fig. 15) flat, oblong-oval in shape, composed of 
a tough, white, cottony, parchmentlike material, opaque 
when dry, but showing pupa underneath when wet. 
Fie. 16.—The Length, 10-12 mm.; width, 5 mm. 
grape-leaf 
sk eletonizer 
(Harrisina 
americana): : , fe ee : : a : 
Pupa. En  upa (fig. 16) uniformly orange-colored in fresh speci- 
larged. (Orig- mens, brown in older ones; oblong-oval, broadest at 
inal. . ‘ ~ : 
; abdominal segments 3, 4, and 5. Eyes and _ spiracles 
darker than rest of body. Spiracles raised wartlike projections, sub- 
conical in shape, eight pairs, the eighth pair the longest. Spiracles 
arranged on latero-dorsal aspect of abdominal segments 2-9. Ante- 
PUPA. 
