THE GRAPE-LEAF SKELETON IZER. 



83 



SirfJi in.^tar {fiill-yroii'n larca) (fig. 14). — C^'lindrical and uniform 

 in sliape, color deo|) sulpluii'-yellow. Head oval-pyramidal in form, 

 dark brown, lii»hUM' above, retractile, concealed beneath first pro- 

 thoracic segment. Mandibles and maxillae dark brown, maxillary 

 palpi yellow, translucent, eyes black. Tubercles flat, wartlike areas, 

 appearing to naked eye as a transverse, me- 

 dian row of black dots. Under a g-inch 

 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 wnth tubercle III wanting, 

 segments 7-14 with tubercle V Avanting, 

 subdorsal and lateral tubercles confluent on 

 segment i;>, subdorsal tubercle confluent on 

 segment 14, the rest wanting. Anterior and 

 posterior segments dorsally and all segments 

 laterally with a number of long, wdiitish, 

 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 snuiller than the rest. Thoracic feet 

 translucent, yellow, small, pointed, with a single black claw at tip 

 and also a few light-colored hairs on sides. Abdominal 

 feet pale yellow, apex wnth a row of small, black, bristle- 

 like claws. Length, 11-13.5 mm.; width of head, 1.483- 

 1.6GG mm. (variable). 



COCOON. 



I''i(;. 15. — The grapc-lciif skol- 

 otonizor {Harrinina ameri- 

 cana) : Cocoon. Enlarged. 

 (Original.) 



Cocoon (fig. 15) flat, oblong-oval in shape, composed of 

 a tough, wdiite, cottony, parchmentlike material. oi)aque 

 when dry, but showing pupa underneath when wet. 

 Fig. 16. — The Length, 10-12 mm.: width. 5 mm. 



g r a p e - 1 e a f 



PUPA. 



s k e 1 etonizer 

 ( Harris inn 

 amcricana): 

 V u p a . En- 

 largod. (Orig- 

 inal.) 



Pupa (fig. IG) uniformly orange-colored in fresh speci- 

 mens, brown in older ones; oblong-oval, broadest at 

 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- 



