1921] NATURAL SCIENCES OF PHILADELPHIA. 11 



Enicostoma quinquecristata n. sp. 



Labial palpi with the anterior edge of second segment pale reddish 

 ochreons, a black spot near base and above middle; remaining scales 

 of brush gray with white tips; third segment j^ellowish, with an 

 annulus near base and the tip black. Antennae gray. Scales of 

 head and thorax gray, with white tips. Fore wings ashen brown, 

 more or less thickly bestrewn with dark gray, minutely white-tipped 

 scales, Avith a tendency to longitudinal streaking in the apical third 

 of the wing; groups of brown white-tipped scales form a series of 

 indistinct marginal spots around the apex. Five scale tufts formed 

 of white-tipped black scales; at one-third, a very large tuft on fold 

 and a smaller one above in the cell; a large tuft at the lower angle 

 of the cell and a smaller one above it; between these two pairs, 

 on the middle of the cell, a fifth large tuft. Cilia grayish brown, 

 with scales white-tipped. Hind wings pale gray, cilia fulvous at 

 the base. Legs densely dusted with gray, hairs on upper side of 

 hind tibiae pale brownish, spreading scales on underside gray with 

 white tips. Expanse, 17-19 mm. 



Type (cf ), Two Medicine Lake. 



The type and twelve paratypes ( cf and 9 ) reared from larvae 

 webbing leaves of Penstemon confertus Dougl., a common small- 

 flowered pale yellow species, collected on the trail to Dawson Pass, 

 Two Medicine Lake, altitude about 5500 feet. The larva lives 

 under a web in a folded leaf, eating out patches of the leaf. The 

 web is usually on the upper side, sometimes on the lower side of the 

 lea,f near the base. Surface of pupa clothed with fine erect hairs. 

 Imagoes, August 6-17. 



Although the food plant was common everywhere throughout the 

 region in the dry meadow at the lower altitudes, the larva of this 

 species was not observed elsewhere. 



The generic position of the species was determined by Dr. Ed- 

 ward Meyrick, who states that it agrees with the type of the genus 

 in all essential particulars, except in the palpi. In E. quinquecristata, 

 the second segment of the palpi is more thickened with scales, and 

 these are more expanded toward apex than in the type. 



The genus Enicostoma is given in Dyar's "List" as a synonym of 

 Semioscopis. 



For convenience of reference, a detailed statement of the generic 

 characters as shown by E. quinquecristata follows : 



Head with loosely appressed scales, side tufts projecting in front; 

 tongue developed, densely scaled except towards tip. Antennae 

 two-thirds, with slightly spreading whorls of scales at apices of 

 segments, alike in both sexes, basal segment without pecten. Labial 

 palpi very long, recurved; second segment clothed with a dense 



