368 
ally thickly covered with minute hairs and more sparsely with longer 
spinous hairs, intermixed; they are also swollen and enlarged toward 
the base. The import of this fact can be best conveyed to you by the 
statement that in all other Lepidoptera that I know of the tongue is a 
smooth organ and in no way armed, except near the tip. Im short, the 
tongue in Pronuba maculata has become an accessory tentacle, serving 
my! f 
Oy Y, 
RobAal| 
Fic. 66.—PRONUBA MACULATA: a@, tip of female abdomen; 57 0, basal joint of ovipositer; é 7 , ter- 
minal joint of ovipositer; o r, oviduct; m p, max. palpus; m ¢, maxilary tentacle; £, tongue; gs elas- 
pers of male from side; gr. claspers of male from behind—enlargement indicated; p r, front wings. 
showing arrangement of spots in two of the more common forms, hair lines showing natural size. 
and helping in pollination, but probably incapable of use for feeding 
purposes. These structural peculiarities justify the conclusion which 
observation confirms, that Pronuba does not feed in the imago state. 
In other words, she has no incentive to go to the stigma with her load 
of pollen, other than that of pollinizing, and the slight amount of nec- 
tar which the plant secretes is well calculated to lead other insects 
which seek it away from the stigma and thus not to interfere with 
Pronuba’s mission. 
DEVELOPMENT AND TRANSFORMATIONS OF PRONUBA. 
On this subject I need only remark that the action of oviposition 
causes a disorganization of the plant tissues m the 
immediate neighborhood of the apical portion of the 
egg and the swelling of the adjacent ovules; that the 
embryo develops in the capitate end of the egg, and 
while the larva is white at first, or of the exact color 
of the young ovule, it becomes slightly greenish or 
roseate when full grown, which is in about a month, 
or coincident with the ripening of the seed. It perio- 
rates the capsule and drops to the ground, having six 
Fis. 67.—Prostss thoracic legs. which doubtless aid it at this period 
YUCCASEELA: 7, male: 2 a8 : < 
m, female chrysalis. Of its life. It remains through the fall, winter, and 
early spring months in a tough cocoon, transforms to the chrysalis 
