SMULYAN: NEW ENGLAND TENTHREDELLA. 397 
nearly procumbent, silvery hairs. The dorsal surface of the ab- 
domen in the female, however, is, as a rule, practically bare, with 
the exception of the apical region, and on the apical portion of the 
sheath of the ovipositor the hairs are as a rule longer and coarser. 
On the apical dorsal portion in the male they are, as a rule, erect. 
Legs. 
The legs are long and slender. They increase in length and 
somewhat in stoutness beginning with the anterior pair. The 
coxae are subcorneal and are close together. The trochanters are 
ditrochate, and the femora have a small basal portion marked off 
from the remainder by a distinct annulus. Each tibia is armed 
at its apex with two strongly developed acute spines or spurs. 
On the anterior tibiae one of these two spurs is bifid; on the 
intermediate and posterior they are subequal. Each of the 
four basal segments of the tarsi bears an arolium at its apex on 
the ventral surface, and the apical segment bears a pair of curved 
bifid claws, between which there is a pulvillus. The outer tooth 
of the bifid claws is longer than the inner; in the males, however, 
the difference is often not very marked. The hairy vestiture on 
the tibiae and tarsi is somewhat coarser than on the other parts, 
and the hair on the ventral face of the anterior tibiae, in line with 
the bifid spur, gradually'' increases in length toward the apex, and 
on that portion is quite prominent. The hind legs in the male 
are relatively strongly and stoutly formed, and the hairs on the 
posterior tibiae and tarsi are somewhat longer than on the cor- 
responding tibiae and tarsi of the female. 
Wings. 
The wings though often hyaline are usually faintly or distinctly 
clouded, in part or entirely. As a rule the cloudiness or infuma- 
tion consists of a pale honey-yellow coloration and is mentioned 
as such in the descriptions. The term clouded in the descriptions 
refers to an infumation which is without color, or in which the 
color is not very distinct. As regards the terminology of the 
veins, the system used by Cresson is adopted. Any one desiring 
the venation of a Tenthredella wing according to the Comstock- 
Needham system may refer to "A Study of the Wings of the 
Tenthredinoidea, a Superfamily of Hymenoptcra," by Alexander 
