-ms? 



BIOLOGICAL STUDIES OF THE GREEN CLOVER WORM 7 



Three oval, slightly elevated bisetose chitinizations are grouped around it, one 

 dorsad, one cephalad, and one ventro-cephalad, all concolorous with surrounding 

 tissue except at immediate bases of seta3 (fig. 8, TI). Mesothorax and meta- 

 . thorax with one pair of bisetose chitinizations on dorsum, and on latus three 

 unisetose and one bisetose chitinizations (fig. 8, Til) , and one fine pale seta (2b) 

 half way between setae 2a and 3. On each 

 of the first six abdominal segments there 

 are six pairs of unisetose chitinizations, 

 two on dorsum, bearing setae 1 and 2, 

 and four on latus, bearing setae 3, 4, 5, and 

 6 (fig. 8, AIV) ; the three lateral chitiniza- 

 tions, bearing setae 3, 4, and 5, form points 

 of a triangle with the cephalic side longest 

 and on a line with the spiracles, chitini- 

 zation bearing seta 6 close to venter. 

 Eighth abdominal segment (fig. 8, VIII) 

 with setae 1 and 2 nearly in alignment 

 with each other, two setae (4 and 6) caudo- 

 ventrad of spiracle, seta 5 more dorsad 

 than on the other segments, and setae 7 

 and 8 on ventrum; ninth abdominal seg- 

 ment (fig. 8, AIX) with setae 1, 2, and 3 

 forming nearly an equilateral triangle, 

 setae 4 and 6 missing, and setae 7 and 8 

 nearly as on the eighth abdominal seg- 

 ment; all chitinizations nearly circular, 

 slightly elevated, and of the same color 

 as the surrounding tissue except for dark 

 areas surrounding the immediate bases 

 of the setae. Setae moderately long 

 and dark. Abdominal spiracles oval, 

 white, with dark rims. Body with a dis- 

 tinct white lateral stripe through spiracles, 



a naiTOw whitish subdorsal stripe along outer edge of posterior dorsal chitiniza- 

 tions, less distinct than in preceding instar, and the dorsal vessel dark green 

 with paler green tissue on either side. 



PREPUPAL STAGE 



The body is considerably shorter than that of the full-grown larva, and in 

 natural position remains slightly curved. It is robust with greatest width near 

 middle, but tapers rather sharply toward caudal extremity; the head and pro- 

 thorax are nearly the same width; the mesothorax is wider and the longest 



Fig. 9. — Pupa of the green clover worm: a, Ven- 

 tral view; 6, dorsal view, a, Antenna; a 1 to a 10 , 

 abdominal segments of pupa; ao, anal opening; 

 cr, cremaster; /, front; g, gena; go, genitiil open- 

 ing; lb, labrum; Ip, labial palpi; md, mandible; 

 mes, mesothorax; met, metathorax; msl, meso- 

 thoracic leg; msp, mesothoracic spiracle; mtl, 

 metathoracic leg; mx, maxilla; pi, prothoracic 

 leg; pr, prothorax; v, vertex; w, mesothoracic 

 wing 



Fig. 10. — Caudal end of female pupa of 

 the green clover worm. Enlarged 



Fia. 11. — Caudal end of male pupa of the 

 green clover worm. Knlarged 



segment in the body. General color pale green wi.th a dark green middorsal 

 stripe, and a similar though sliglitly broader lateral stripe running on a line 

 just dorsad of spiracles. Longitudinal white markings entirely lacking; ocelli 



QO longer black but concolorous With fare; spiracles transversely Oval, while in 

 color, edged with brown. Pedal extremities retracted, leaving skin loose;. As 

 pupation approaches, the body becomea sufficiently contracted to leave the skin 

 around the caudal extremity vmnkled 



