524 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 9 



first pair may be somewhat shorter than the others, hght yellow; dorsal lin6 pale 

 white, somewhat broken, margined on each side by a darker border (PL 39, fig. 2). 

 Subdorsal line very pale and indistinct, bordered as dorsal fine; lateral line indis- 

 tinct and broken, narrow, pale white. Sub-stigmatal line wider and continuous but 

 of a paler color than dorsal and subdorsal. Ventral surface yellowish green. Stig- 

 mata brown. Tubercles black. These and the seta; are placed as represented in 

 figure 37. The lettering follows Fracker's recently published plan (111. Biol. Mono- 

 graph, vol. II, No. 1). The diagrams also show the position of the longitudinal Unes. 



This instar also 

 lasts from three to 

 four days during 

 which time the cater- 

 pillar grows from an 

 average of 9 mm. to 

 15 or 16 mm. in 

 length. 



Fourth Instar.— Dor- 

 sal, subdorsal and sub- 

 stigmatal lines more 

 distinct than in the third 

 instar. All feet used in 

 walking but the first and 

 to a lesser degree the 

 second pair noticeably 

 shorter than the others. 

 Otherwise this instar is 

 very like the third. 



In our cages the 

 average time spent 

 in this instar was 

 3.7 days and the 

 larvae grew to an av- 

 erage length of 18 

 mm. 



y4bdo(nf 



Se t T H Abdontin 



Si3S / ind Z o-fAbJoivin. 



Fig. 37. Anticarsia gemmatilis, diagrams of represen- 

 tative larval segments, showing position of setse; d. I., 

 dorsal line; s. (7. I., sub-dorsal line; p., prolegs; s., 

 stigmatae. 



Fifth Instar (PI. 39, 

 fig. 2). — Also similar to 

 the third instar but the 

 longitudinal lines are more clearly defined. PapiUse are now white with brown apexes. 

 In the area between the dorsal and subdorsal lines there are a few white dots with a 

 brown border. One of the largest of these (PI. 39, fig. 2) is situated near the anterior 

 border and subdorsal line on abdominal segments 1-8. On the metathorax it is 

 double. Stigmatal line is brownish yellow, broken, widely bordered with white on 

 the ventral margin. In the fighter colored individuals this line is often a rich yellow 

 bordered by lines of deep pink. 



This instar lasts .three or four days and before molting the caterpillar 

 commonly reaches a length of 25 mm. 



