424 
[March 
scarcely reaching to the middle of the face, slightly curved, slender, 
smooth and pointed; in dead specimen the palpi are depressed and 
much divergent laterally; the terminal joint is very short and indis¬ 
tinct. No maxillary palpi. Tongue naked, short, rather longer than 
the face. 
When at rest the imago holds the posterior pair of legs elevated at 
the sides above the wings, and in walking—its motions are very ac¬ 
tive—uses them by making very rapid vibrations, during which they 
touch the surface for only an instant. The femora and tibia of the 
posterior legs are not hairy but quite densely clothed with spines, and 
the feet of this pair appear to be without hooks. The antennae are 
porrected. 
The mine of the larva is like that of an Elachista, beginning as a 
long threadlike line and towards the latter part of larval life is enlarged 
into a blotch. When it has reached maturity, it cuts a perfectly circu¬ 
lar disk from the upper cuticle of the leaf, folds it along its diameter 
and unites the edges of the circumference, so as to make a semicircle. 
When completed the larva enclosed in its semi-circular cocoon, lets 
itself fall to the ground, where it attaches the cocoon to some adjacent 
object. 
C. Panicifoliella. —Fore wings dark brown, with a violet hue,- from the mid¬ 
dle to the tip, bright silvery, with a bright silvery band about the basal third, 
Cilia violet-brown. Hind wings violet-brown, cilia fuscous. 
Head and thorax silvery. Antennae brown, touched with a silvery hue to¬ 
wards the base. 
The larva mines of the leaf of Panicum clandestinum early in July. 
My specimens were taken July 9th, and at that time many mines were 
tenantless and appeared to be old and are characterised by the circular 
piece cut out of the upper cuticle. The mine begins near the base of 
the leaf as a minute, threadlike line and runs to the tip, thence returns 
along the side to the middle of it, when it is irregularly enlarged by 
the larva. 
On July 12th, five specimens taken on the 9th began their prepara¬ 
tions for pupation, and on the 25th of July two imagos made their ap¬ 
pearance and continued to appear for several days subsequent. 
Easton, Pennsylvania. 
