THE CANADIAN ENTOMOLOGIST 193 



At the time of pupation the larva departs widely from the 

 well-known habits of all the other species of the genus. Previous 

 to this time the mine has been placed just beneath the epidermis. 

 At maturity the larva cuts through the epidermis and two layers of 

 bark beneath it around the end of the mine and for a distance of 

 3 or 4 mm. on each side. This elongate flap of tissue which hangs 

 with its free end downward is then bent into a fold which causes 

 it to project beyond the contour of the stem. The cocoon is spun 

 on the under side of the flap, so that its lower surface is visible if 

 the flap is lifted up. At the anterior end of the cocoon a slit is cut 

 in the lower layer of loosened bark and through this opening a 

 passage lined with silk leads to the exterior, so that at emergence 

 the pupa is thrust out between the two layers of loosened bark at 

 the loAver end of the flap. The pearly globules, so characteristic 

 of the cocoons of the other species of the genus, are entirely absent 

 in this instance. In other respects this species agrees with the 

 characteristics of the genus. 



There are two generations a year. The larva? of the first 

 generation pupate toward the end of July and produce imagos in 

 early August. The larvtX of the second generation pupate in Oc- 

 tober, but the imagos do not appear untill the first of the following 

 June. 



The imago is nearest to M. arbutiella Bsk. 



Marmara apocynella, n. sp. 



Head whitish on face, becoming distinctly yellowish on the 

 vertex, with some fuscous scales behind. Palpi whitish, the second 

 segment of the labial palpi tipped with black. Antennae gray. 



Fore wings black; a straight white fascia at basal fourth: an 

 obliciue fascia at the middle, a little angulated near the dorsum; 

 at two-thirds, a triangular costal spot and opposite it a small 

 inconspicuous dorsal spot; a white costal streak before the apex. 

 Cilia white opposite the apex, elsewhere gray. Hind wings and 

 cilia gray, tinged with yellow. 



Legs black, annulate with white; first tarsal segment black 

 with a white tip, remaining sagments pure white with an occasional 

 black spot near the tip. Abdomen black above, grayish beneath. 



Expanse: 5 mm. 



