68 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



they are developed. In Tosca, on the other hand, the gejiitalia 

 are symmetrical throughout. In most other respects the organs 

 are similar in the two genera. Evipye has the harps symmetrical 

 but the general structure of the genitalia is more like that of some 

 species of GelecMa. E. prunifoliella Chambers (the type of the genus) 

 has the gnathos developed into a long narrow mandibulate hook 

 (pi. 4, fig. 22) with its two elements oi^ening like a pair of ice tongs 

 and apparently f u7ictioning as an uncus, although the uncus proper is 

 also present and rather well developed. The latter is similar in shape 

 to that of Gelecliia negundella but somewhat longer and stronger. 



TOSCA PLUTONELLA, new species. 



Plate 4, figa. 19-21; plate 8, fig. 46. 



Palpi white; a few black scales on under side of second joint; on 

 terminal joint two narrow black bands. Antennae white, irregularly 

 but strongly marked with black. Face, head, thorax, and forewings 

 white, rather densely dusted with black and blackish fuscous scales. 

 On forewing three conspicuous sub-dorsal black dots; one on vein 

 lb at basal fourth, another on vein Ih beyond basal third, and the 

 third at anal angle of the cell; on the middle of the cell and near 

 middle of costa the black scaling is also more pronounced but does 

 not form definite spots or other markings; cilia greyish white. Hind 

 wings pale whitish fuscous, a trifle darker toward apex; cilia con- 

 colorous; in the male on the upper side of wing along vein lb a tuft 

 of yellow hair-like scales, closely appressed and not protruding beyond 

 the dorsal margin of the wing. Abdomen silvery white. Legs white, 

 heavily dusted with black; tarsi white banded with black. Male 

 genitalia of type figm-ed. Alar expanse, 8mm. 



Habitat. — Hell Canyon, Manzano National Forest, New Mexico. 

 (Heinrich.) 



Food Plant. — Prunus. 



Type.~CAt. No. 21809, U.S.N.M. 



Two moths (male and female) reared under Hopk. U. S. No. 13968 

 June 4 and 13, 1917, from material collected September 16, 1916. 

 The larvae are leaf-miners in the wild cherry for their enthe feeding 

 •period. The mine is irregular and somewhat similar to that of a 

 Parectopa, with several branching galleries. It begins along the mid- 

 rib and sometimes develops into considerable of a blotch, but normally 

 is more or less linear and digitate. At the end against the midrib 

 is a hole from which the larva discharges its frass (no frass is left in 

 the mine) and adjacent to this hole along the midiib is a fine silken 

 web under which the larva retires when not feeding. 



Larva full grown about 6 mm. long. Body yellowish white faintly 

 tinged with pink on dorsal surface; legs pale; crochets light brown, 

 16-20; thoractic shield divided by a pale median longitudinal line 



