2 Annals Entomological Society of America  [Vol. XIV, 
anterior end of the outer. The lower apical appendages are 
conspicuous and present the principal aspect of the genital 
chamber. As stated above, they appear to be sub-continuous 
with the inner apical appendages and both arise from the inner 
surface of the ninth pleurites; laminate in form, the basal 
portion broadly horizontal, the apical part more or less con- 
voluted, generally emarginate within and without, -(Pl. I, 
Figs. 1, 2, 3, 4, 5, 6, 10), having somewhat the shape of a plough- 
share. In a few species (diversa, lyrifera, Pl. I, Figs. 1 and 2), 
they are narrowly lanceolate and extend conspicuously beyond 
the ninth sternite. 
The eighth sternite is narrowed posteriorly, subtruncate, or 
emarginate apically and bears a brush of stiff hairs. In two 
species (pyramis, pellucida, Pl. I, Figs. 7 and 7a) the apical 
margin bears a median process, from its upper surface, near 
the base, projects a long, slender, curved appendage (PI. I, 
Fig, +): 
Ovipositor elongated; valves slender, the upper pair slightly 
curved upwards. 
The following characters are common to all the species 
here enumerated and will not be repeated in the description 
of new species. Rostrum of moderate length and thickness; 
nasus short, obtuse (except mutrata). Palpi robust, the last 
joint at most as long as the three preceding joints together. 
Frontal callosity small. Antennae of moderate length, flagellar 
joints approximately unicolorous, fuscous, except the basal 
joint, which is more or less concolorous with the scapal joints; 
the basal enlargement, bearing the usual whirl of setae, is 
usually more blackish than the rest of the segment, the setae 
scarcely as long as the respective segment. Thoracic dorsum 
with four darker lines or stripes, generally narrow (broad, 
pyramis, pellucida), the inner pair of these lines apparently 
limit the normal median vitta, are wider and curved out- 
wardly in front, becoming attenuated and approximating 
each other posteriorly; the lateral stripes are scarcely more 
than one half the length of the thorax, the anterior end being 
at same distance from the pseudosutural foveae, and are 
margined with a paler line (except pyramis, pellucida); the 
outer edge of the inner lines bears a row of generally very short 
hairs. Wings approximately unicolorous, antestigmal spot 
distinct, extending at least into cell 1st M?; except dimidiata, 
