30 
developing pupa bright red. There is no marginal fringe, or but very 
rudimentary. Margin of case crenulated, the wax tubes bluntly 
rounded: the incisions between tubes are but moderately deep and 
acute; rather light thickenings extend in from margin, and the thick- 
ened margins of the wax tubes maybe discerned extending a short dis- 
tance mesad. There is no distinct marginal rim. Pupa-case applied 
quite closely to leaf, and there is no vertical fringe. Dorsum almost 
Mat. and void of waxy exudation, tubercles, or pores. Abdominal 
segments rather obscure, evident only about the middle one-half of 
case. There is a pair of well-developed seta? arising within caudal 
margin of case, extending dorso-caudad some distance beyond the 
margin. There is a pair of small setse on cephalic margin of case, and 
a pair on caudo-lateral margin. 
Yasiform orifice subelliptical in outline, and comparatively small. 
Operculum medium, subcircular, broader than long, about one-half 
length of orifice; cephalic margin straight. Lingula quite as long as 
orifice, frequently protruded, with distal subcircular enlargement, 
which is minutely setose; on ventral surface, legs moderately distinct. 
Adult ? . — Length about 0.97 mm.; length of hind tibia, 0.38 mm.: 
size of fore-wing, 1.12 by 0.43 mm.; length of hind tarsus 0.22 mm. 
Color, pale yellowish; eyes brown, slightly constricted at middle. 
Wings unspotted. Antennas of seven joints. Joint 1 small, cup- 
shaped; 2, unusually long, somewhat more than three times length of 
first, pyriform; joint 3, slightly more than twice the length of second. 
Mentum. slender at base; first joint comparatively long, longer than 2 
and 3 together; second short, not quite one-half length of third; third 
gradually tapering distad, but slightly constricted just proximad of 
the brownish black point. 
Vasiform orifice cordate. Operculum not one-half length of orifice, 
convex dorsally, and on caudal margin concave, the margin thickly set 
with rather long setae. Lingula protruded, and strongly bent as it 
extends out of orifice, gradually tapering from base to the strap-like 
distal portion, very thickly set with seta 4 . 
In fore-wing, basal vein let rather obscure, and arising apparently 
distinct from main vein. Margin of wings all around yellowish, but 
deepest on cephalic margin, where the color becomes somewhat reddish. 
Received by the Division of Entomology al Washington from George 
C. But/. Pennsylvania State College, November L9, 1898, on Nephro- 
lepis with the statement that hundreds of the winged form are living 
around in the conservatory of the college. A few of the imagos were 
bred oul November 25 from the pupae sent, by Mr. Perganda, from 
which the description of the adult stage has been made. This species 
is interesting as occurring on a fern. Div. Ent. No. 8210. Pupa-case 
described from numerous specimens; adult ?. from 3 specimens. 
