140 MISSOURI BOTANICAL GARDEN. 
tilizable. Yet a Pronuba is needed and it will prove most 
interesting to observe her manner of working. 
Neither pollination nor oviposition has been observed in 
this species, nor is the chrysalis so far known, and I shall 
be very glad to get further facts upon the subject from 
those having opportunity to observe them. 
The habits of the larva are very similar to those of 
yuccasella. It leaves the pod as soon as mature, buries in 
the ground and spins a similar cocoon. I have known a 
few to remain in gathered pods, however, after having 
made the perforation which was partly closed with web, 
and though this would indicate that transformation may 
exceptionally take place within the pod, the fact has not yet 
been experimentally proved. 
Larva.— Average length 16 mm. Absolutely identical with that of 
yuccasella both in coloration and structure, the only difference notice- 
able being that, if anything, it is slightly more slender and with the 
thoracic segments less swollen. 
IMaGo (Pl, 42, Fig. 2).—Expanse, 9, 19-21.5 mm.; <j’, 17-17.8 mm. 
Head white eyes black, mouth parts yellowish but very sparsely 
clothed with white scales; antenne yellowish, the tips fuscous, sparsely 
clothed with scales on the basal half only; maxillary tentacle (mt) 
yellowish, the base green, large, more swollen, much longer than the 
tongue, tapering toward tip which is often coiled spirally; hirsute rather 
than spinose, covered densely with fine hair, intermixed with scales, and 
a few spines on ventral side; maxillary palpi (mp) but half as long as 
tentacle with the basal or elbowed joint very prominent, the second joint 
not bulbous and the third joint relatively much shorter than in yuccasella; 
tongue (¢) short, stout, swollen basally and, together with the maxillary 
palpi, hirsute (they are smooth in yuccasella) the hairs strong and 
spinous beneath. Thorax white; primaries (pr) with the upper surface 
opaque white, bordered with from 10-12 black spots (when all are 
present) of varying size and running from just beyond the middle of the 
wing to about the inner angle; the disc with 5 spots, 4 of them in a line 
from base to apex, the 2nd and 38rd rather farthest apart, the 
5th or middle one below and nearest the 8rd from the base; un- 
der surface deep fuscous, intensified around the borders and with 
the spots of upper surface barely indicated; fringes white; second- 
aries transparent, being very slightly covered with elongate fuscous 
scales, thickening on the borders, especially toward apex; fringes 
faintly fuscous; legs white, tarsi very sparsely clothed and yellowish 
except at extreme tips, which are more fuscous. Abdomen white be- 
neath, fuscous above. Integument of head yellowish; of thorax and 
cox black or blackish. Terminal abdominal gone in 2 short and 
thick, obliquely truncate from beneath (a) usually bare, honey-yellow 
with its base black; ovipositor stout, decurved, the terminal, horny joint 
(tjo) broad and rounded atthe tip and at its edge finely denticulate. 
Claspers of ({\ short, abruptly curved upward, the base broad and 
rounded, the tip expanded, leaf-like, twisted, preceded by a deep excava- 
tion, but without tooth or tubercle (gs, side view; gp, posterior view) 
