772 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvir. 



sanguhieJla Bcntenniiillei /' but. it is a much more robust in.sect and 

 has none of tlie deep red color found in sangulnella. 



1 have long possessed the type of this striking species as a uni([ue, 

 kindly given me by Miss Marj^ Murtfeldt on a visit to her home, and 

 I take pleasure in naming it in her honor. I was much pleased to see 

 another perfect specimen from such a different locality as Washington 

 in Mr. Piper's collection. 



MARMARA Clemens. 

 MARMARA ARBUTIELLA, new species. 



Antennffi dark shining brown. Labial palpi blackish browti, ter- 

 minal joint with tip and an annulation around the middle silvery 

 white. Maxillary palpi brown mottled Avith silver. Lower part of 

 face silvery white. Head dark, blackish brown. Thorax dark brown. 

 Forewings shining, dark blackish brown with silvery white markings, 

 consisting of a straight-edged perpendicular silvery white fascia at 

 basal third ; another on the middle of the wing slightl}^ oblique and 

 attenuated centrally; a large triangular silver}^ white costal spot at 

 apical third and a smaller one opposite on the dorsal edge; a small 

 white costal spot just before apex. Apical cilia white, dorsal cilia 

 dark brown. Hindwings dark brown. Abdomen fuscous, annulated 

 with silvery white. Underside of body silvery white. Legs black 

 with broad silvery white annulations. Venation typical. Expanse: 

 6-7 mm. 



Foodplant: Arbutus menziesi. 



Ilahitat. — Seattle, Washington, May (Kincaid and Meary). 



Ty2)e.—Cn.t. No. 7868, .U. S. National Museum. 



This species was bred in May, 1898, from material received at U. S. 

 Department of Agriculture from Mr. E. 8. Meary, Seattle, Washing- 

 ton, who wrote that the ornamental arbutus trees were made unsightly 

 by the work of this insect in the two-year-old leaves. This Nvas very 

 apparent from the appearance of the leaves submitted, which were 

 crossed and recrossed by the yellow and white mine, so that more than 

 half of the upper surface was discolored. The moth Lws its a^^g on 

 the underside of the leaf and the young larva eats its way through 

 the leaf at once and makes a very long (10-20 inch) irregular, wind- 

 ing", serpentine mine just under the upper epidermis. 



The mine is silver}^ white, and very narrow in its early course, which 

 is presumably made in the autumn of the year; in its later (spring) 

 course it widens out (2-5 mm.), and appears golden j'ellow when 

 deserted. Several mines were found on each of the leaves received. 



When full-grown the larva sheds its skin in the end of tlie mine and 

 escapes through a curved slit in the epidermis. No observations were- 



«Seep. 770. 



