SMULYAN: NEW ENGLAND TENTHREDELLA. 401 
legs, for instance, four faces, viz., anterior, dorsal, posterior, and 
ventral, are recognized (the legs, exclusive of the coxae, consid- 
ered as being perpendicular to the body), and the more general 
terms, before, above, behind, and beneath refer, respectively, to 
those faces, and are used in those cases where a color is princi- 
pally, but not exclusively, on the particular face to which it refers. 
Thus there may be an expression as "femora with a longitudinal 
black band above," or ''tibiae black, yellowish before," etc. 
Again, in connection with the abdomen, side of tergum is a general 
term for the lateral portion of an abdominal tergum, and terga 
on the venter refers to the overlapping portions of the terga on the 
venter when they differ in color from the sterna. The prescutum 
is often margined along its converging sides with a different 
color, and this particular marking is termed "V-spot." 
Abnormalities. 
Abnormalities occur very largely in the venation of the wings 
and consist principally in the presence of extra or additional 
veins. Five cubital cells were found in each of the anterior wings 
of a female secunda (MacGillivray), the second cubital cell being 
divided into two smaller cells by an extra transverse cubital vein; 
the closed cubital cell in one of the hind wings of a male semirubra 
(Norton) was similarly divided. The left hind wing of the type of 
dubitata (MacGilHvray) besides having the closed cul)ital cell trans- 
versely divided, has an additional longitudinal vein in its apical 
portion between the cubital and the discoidal veins. There is 
also a well-developed extra vein in the same specimen in the first 
discoidal cell of the; loft fore wing, extending from the lower apical 
angle about half-way toward the cubital vein, and there is a 
shorter backward-extending spur from the transverse medial in 
the right wing. Similar spurs are sometimes fovmd in other parts 
of the wings in specimens of other species. One fore wing of a 
male verticalis (Say) had a subcontracted lanceolate cell. Rarely, 
a transverse cubital vein is missing in the fore wings. 
A most interesting abnormality was found in a female semi- 
rubra from Amherst, Massachusetts. This specimen has four 
ocelli, the anterior ocellus being replaced by two smaller ones. 
This unique variant is in the collection of the Massachusetts 
Agricultural College. 
