38 
It has seemed necessary to create a new generic term for certain 
western and southwestern species, formerly included in Rhizagrotis, and 
which, in form of genitalia, approach closest to the European signifera 
Schiff., type of the genus Ogygia Iibn. 
Besides the type species, lagena Grt., the writer includes querula Dod 
and polingi B. and B.; also milleri Grt., biclavis Grt., and elevata Sm. 
(terrified Sm.). The first two species are distinctly congeneric, both show- 
ing the short projection on outer margin of clasper, but specifically distinct 
in the finer details. Polingi lacks this projection, but otherwise fits in well 
with the other two. The next two are more aberrant, but closely related 
to each other; they show hairier vestiture, a rougher front, bipectinate 
or dentate and fasciculate antennae, a stronger metathoracic tuft and 
weak spining on the fore tibiae; on genitalic characters they are quite close 
to polingi with rather weaker corona, and in the case of milleri a rather 
broader and stumpier clasper. Elevata also is distinctly related to milleri: 
the fore-tibial spines are better developed and the vestiture is hairier; in 
the genitalia the harpe is broad and shovel-shaped, but the general similarity 
is unmistakable. It is quite probable that a study of neotropical material 
will show the true relationship of this group. 
Spaelotis Bdv. 
1840, Ind. Meth. 106 (type, ravida Schiff.). 
Amphitrola Warren, 1909, Seitz, Gross-Schmett. d. Erde, Palae. Noct. Ill, 57 [type, 
clandestina Harr. ( unicolor Wlk.)]. 
Eyes naked. Palpi upturned, third joint somewhat porrected; second 
joint fringed below with moderately long hairs; third joint with slight 
pointed apical tuft of hair beneath. Front smooth. Male antennae ciliate. 
Tibiae all spined; fore tibia longer than first tarsal joint, smooth-scaled, 
with complete row of spines on each side. Fourth row of spines on tarsi 
lacking or only indicated by an occasional odd spine. Vestiture of thorax 
rather flat, scaly, with no distinct tufts. Abdomen flattened, the female 
(in our North American species) with a pair of sublateral foveae near 
extremity. 
Figure 16. Male genitalia of Spaelotis clandestina Harr. 
Male Genitalia. Clasper long, narrow, pointed apically, without 
corona; sacculus strong, with harpe attached to apex but not lying quite 
