534 Finn report of the entomological commission. 
1 \>{>ticiila rratiu/ifoliella Clem. 
The larva may be found in the leaves of the dwarf thorn, Crataegus 
parvifolia, from the middle to the latter part of July. The mine is 
rather a wide tract, not long, most often tortuous, sometimes turned 
back on itself, and when nearly straight, with irregular edges, having 
a narrow, contorted line of frass running through the middle of it. The 
latter half of the mine will average at least a line in width. 
One larva which I especially observed mined a space of Jive lines in- 
three days, at the end of which time it was full-grown. Previously it 
was not more than half-grown, and the distance mined while under 
observation forms nearly one-half the length of the entire mine. The 
larva enters the pupa state during the latter part of July. (Clemens.) 
Larva. — The larva is rather thick, bright green. (Clemens.) 
5. Lithocolletis cratajqella Clem. 
The larva mines the underside of blackthorn* during September 
and October. The mine is usually limited by two veins of the leaf. 
The imago appears in April and May. 
Larva. — The larva is cylindrical with a very pale brown head; the body yellow- 
ish, colored dark green by the ingesta. 
Moth. — Antennae, front and tuft dark silvery gray ; forewings rather deep brownish 
golden, with a broad silvery basal streak, black margined toward the costa, ex- 
tending to the teguhe in front and pointed behind, with the point black-margined 
on both sides and with the costa black. Four costal silvery streaks, the first oblique 
but rounded beneath and black-margined on both sides, the others toward the base 
alone. Three silvery dorsal streaks, the first rather broad, oblique, nearly touching 
the first costal, and black-margined on both sides, as also the second ; the third only 
toward the base. A streak of black scales in the middle of the wing at the apex, ex- 
tended backwards between the streaks to the second dorsal and costal. Hinder- 
inarginal line blackish, with a violet metallic hue ; cilia dark fulvous. (Clemens.) 
6. Ornix crata'gifolieUa Clem. 
The larva mines the leaves of Crataegus tomentosa (blackthorn) in 
September, and becomes a pupa early in October, weaving a reddish- 
brown cocoon in a turned-down edge of the leaf. The pupa case is 
thrust from the end of the cocoon at maturity, the iinag;o appearing 
early in May. There is, doubtless, a summer brood, but I have not 
sought for it. 
Larva.— The head of the larva is brown, the body greeuish-white, with the dorsum 
reddish. brown. 
Moth— Labial palpi whitish. Head dark brown and gray intermixed. Antenna} 
dark brown, faintly annulated with whitish. Forewings dark brown, with a pur- 
plish hue. Along the inner margin, from the base to the anal angle, whitish, dusted 
with dark brownish. In the fold at the base is a dark- brown streak, and a small blotch 
of the same hue beyond the middle, nearly reaching to the inner margin. Toward 
* In Asa Gray's Manual of the Botany of the Northern United States the name of 
u black or pear thorn w is assigned to Cratagui tomentosa. — H. T. Stainton. 
