192 THE CANADIAN ENTOMOLOGIST. 



earlv stages; in the later portions of the blotch, the substance of 

 the leaf is consumed, rendering the mine distinct. Pupa outside 

 the mine in broadly oval, flat, yellow cocoon spun in a fold of 

 the leaf or in a crevice. 



There are two generations a year. Mines may be found in 

 earlv July and in October. The two imagos in my collection 

 appeared July 25 and May 1 respectively. 



The position of the imago at rest reminds one of a small species 

 of Or nix. 



Marmara auratella, n. sp. 



Head and thorax dark brown, with a distinct bronzy lustre; 

 face metallic gray. Labial palpi bronzy, third segment with the 

 apical half whitish. Maxillary palpi with the last segment pale. 

 Antenna? dark brown. 



Fore wings bronzy brown, with an almost golden lustre under 

 brilliant illumination. The markings are brilliant silvery white 

 and are situated as follows: At the basal fourth a fascia nearly 

 straight on its inner margin, but broadening outwardly below the 

 fold; at the middle of the wing a somewhat oblique costal streak, 

 and nearly opposite it, but a little farther back on the dorsal 

 margin, an erect dorsal streak; at the apical third a triangular 

 costal streak almost meeting the apex of a similar dorsal streak; 

 just before the tip a narrow costal streak, nearly crossing the wing. 

 Cilia dark brown, shining white opposite the apex. Hind wings 

 dark brownish gray, cilia concolorous. 



Legs dark brown, with broad silvery annulations. Abdomen 

 beneath with segments silvery posteriorly. 



Expanse: 6.5 mm. 



Two specimens. Cincinnati, O., bred from long serpentine 

 mines on stems of the cultivated form of Riidbeckia laciniata L.. 

 the "Golden Glow "of gardens. I have searched for the mines 

 on the stems of the wild plants, both here and elsewhere, without 

 success. The mine, which is very similar to that of Marmara 

 salictella on willow, is usually situated toward the lower part of 

 the stem. The larva mines just beneath the epidermis usually 

 working downwards, although the mine crosses on itself many 

 times. 



