534 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 

 4. Nepticnla cratwgijoliella Clem. 



The larva may be fouud in the leaves of the dwarf thorn, CraUcgus 

 parvifolia, from the middle to the latter part of Jnly. 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 thro'ugh the middle of it. Tbe 

 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 cratceqella 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 browu head 5 the body yellow- 

 ish, colored dark green by the ingesta. 



Moth. — AntennjB, 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 teguhxi 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 an<l 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- 

 marginal line blackish, with a violet metallic hue ; cilia dark fulvous. (Clemens.) 



6. Ornix cratcegifoliella Clem. 



The larva mines the leaves of Cratcegus 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 imago appearing 

 early in May. There is, doubtless, a summer brood, but I have not 

 sought for it. 



Larva. — The head of the larva is browu, the body greenish-white, with the dorsum 

 reddish-brown. 



J/o//).— Labia) palpi whitish. Head dark brown and gray intermixed. Antennae 

 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 

 ^' black or pear thorn " is assigned to Crakegns tomentosa. — H. T. Stainton. 



