YUCCA MOTH AND YUCCA POLLINATION. 141 
Described from 12 99, 9 ¢¢ from Southern California. 
In the specimens from Los Angeles Co., California, the 
spots along the anterior margin are, as a rule, considerably 
smaller, those at posterior border more or less confluent 
and often united with the terminal of the discal spots; 
while two or three of the remaining discal spots are want- 
ing. The apical fringe and a shade of the apex are 
distinctly dusky or blackish. ‘The secondaries are some- 
what darker, especially toward the apex of the anterior 
margin, with a narrow blackish border all around and more 
or less distinctly dusky fringe. In specimens not rubbed, 
the anal joint of the female abdomen, and the male genitalia 
are freely covered with pale hair. 
Examination of the venation in one male shows that 
marginal veins 7 and 8 arise from the transverse vein inde- 
pendently of the discal branch of the subcostal vein and 
that the upper fork of the independent discal veinlet is 
wanting. 
In one of the male specimens only four of the spots on 
the border of the primaries are present, and in this speci- 
men, as well as in one other male and one female, the 
second discal spot is absent. 
PRONUBA SYNTHETICA, 0. Sp. 
[Pl. 41, Figs. 1,2; Pl. 42, Fig. 1.] 
This is the most remarkable of the three known species 
of the genus and bears a striking general resemblance to cer- 
tain Saw-flies (genus Dolerus), both in color, habitus, and 
form. It also strongly recalls, especially in nature and 
with wings closed, certain Neuropterous species of the 
family Sialide, as Stalis infumata. 
This general resemblance is due to certain characteristics 
which are quite abnormal in Lepidoptera, e. g., the naked 
and fuliginous wings, and the dark, polished and flattened 
body, with its broadened, horny and angulate tip. But it 
extends to other details. Thus the two metathoracic pale 
spots, exactly in the position of the cencri of the Tenthre- 
