156 MISSOURI BOTANICAL GARDEN. 
PLATE 38. 
Fig. 1. — Pistils of Yucca jfilamentosa, showing (a) a 
deformed specimen and (0, c, d) varying lengths of the 
stamens. 
Fig. 2.— Pronuba yuccasella, female, in the act of 
gathering pollen from the anthers — 5. 
Fig. 3. — Chauliognathus pennsylvanicus: a, larva; b, 
its head and prothorax; ¢, d, f, g, h, its mouth parts ;e, its 
leg; 7, beetle — all enlarged but @ and 7. 
Fig. 4. — Flower-stem of Yucca showing scars resulting 
from oviposition of female Prodoxus decipiens (a, a) and 
pupal exuvia of same protruding (8, 0, b). 
PLATE 39. 
Fig. 1.— Prodoxus decipiens: a, larva; 6, head from 
above; c, d, left jaw and antenna; e, pupa; J, infested stem 
cut to show the burrows, castings, cocoons (7), exit hole 
(g) and pupa shell (4) —all enlarged but /, the hair line 
between a and e showing natural length. 
Fig. 2. — Prodoxus decipiens: a, imago, wings closed ; 
b, female do. wings expanded — nat. size; c, maxillary 
palpus with its basal tubercle enlarged. 
Fig. 3.— Genital characters of Prodoxus decipiens: 
a, tip of 9 abdomen rendered somewhat transparent; 0b, 
basal part of ovipositor; c, its sculpture; d, terminal part 
of same; e, its tip more enlarged; /, genitalia of ¢ from 
side; g, do. from above; hk, egg — all enlarged. 
Fig. 4.— Prodoxus decipiens: Female in the act of 
ovipositing — x 3. 
PLATE 40. 
Fig. 1. —a, receptaculum seminis of Pronuba yuccasella, 
showing radiate bodies or crushers and muscular struct- 
ure; 6, same, longitudinal section through axle of hub, 
showing the main sac and the inner sac at ¢ and the radiate 
bodies in the intervening space at d— x40. 
