l68 ENTOMOLOGICAL NEWS [April, 'l2 



larva forms the usual characteristic cone by rolling down the 

 tip of the leaf. These larvae are extremely difficult to rear, 

 and I have succeeded in breeding but a single moth which 

 emerged late in autumn. This specimen unquestionably repre- 

 sents Gracilaria ostryaeella Chambers. 



On the underside of Carpinus between the lateral veins are 

 narrow linear mines spreading out into flat blotches which be- 

 come transparent and marked with a dark network of veins. 

 When viewed from the upper side of the leaf, the completed 

 blotch on Carpinus is remarkably similar to the upper side 

 blotch on Ostrya. Specimens bred in September and October 

 from the underside mines on Carpinus are identical with the 

 specimen bred from the upperside mine on Ostrya. In spite of 

 the different larval habit I think they must be regarded as 

 belonging to the same species. An underside mine like that 

 on Carpinus is found on Ostrya, and is doubtless also a mine 

 of G. ostryaeella Cham. 



The summer form bred from underside mines on leaves of 

 Carpinus collected in July, emerges in the early part of August, 

 and affords a remarkable example of seasonal variation. Its 

 identity with the later form would never be suspected from 

 captured specimens. The two varieties are described separ- 

 ately below. 



SioiDiicr form : Antennae ocherous, tinged with bronze toward the 

 base, becoming darker toward the tip and broadly annulate with dark 

 brown. Labial palpi yellowish white, third joint annulate with dark 

 brown just before the tip. Maxillary palpi yellowish white. Face, head 

 and thorax pale golden, the vertex somewhat bronze. Forewings suffused 

 with purplish bronze; a pale golden patch at the base, broadest on the 

 dorsum ; costal triangle pale golden, broadly truncated on the fold and 

 extended outwardly as a band along the costa to the costal ciha. This 

 pale patch is almost immaculate, there being only two or three brown 

 scales on the costa. Hindwings fuscous, cilia reddish. Fore and 

 middle legs dark purplish brown except the tarsi, which are white 

 sometimes faintly tipped with black. Hind legs pale yellowish; a black 

 patch externally on the apical half of the femora; tibiae and tarsi 

 sometimes tipped with dark brown. Expanse : 9-5-IO mm. 



Autumn form: Antennae grayish, annulate with dark brown. La- 

 bial palpi dark purplish brown except the inner side of the second 

 joint, and the upper side near the base and extreme tip of the third 



