250 I'ROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxiii. 



in a slight fold on leaf. The average cocoon measures 7 hy 4 mm. 

 The pupa is at first white, with black eyes, part of which the enlarged 

 first antenna! joint covers; the antennae reach far bej^ond anal tip. 

 On the front of the head is a stout, sharp, brown spine, used to cut 

 the cocoon when the imago issues. 



When mature the pupa assumes the coloration of the imago. The 

 pupa stage lasted in a warm room about three weeks. The pupa shell 

 is left protruding from the cocoon. Position of imago at rest like 

 that of Gracilaria, but with antennae porrected obliquely in front. 



EUCOSMOPHORA, Walsingham. 

 EUCOSMOPHORA SIDEROXYLONELLA, new species. 



Antennt\3 f, simple, basal joint without pec^ten, dark fuscous at 

 base with a cupreous sheen. At rest, porrected straight in front of 

 the insect. Labial palpi long, smooth; third joint as long as second, 

 in the living insect recurved, overarching the vertex, kept rather far 

 from face; in dead specimen laterally divergent. Color bright gold(Mi. 

 Maxillary palpi small but distinct, golden. Eyes in the living insect 

 brilliant coral red. Head and thorax smooth, shining metallic golden. 

 Forewings bright metallic golden with cupreous reflections. Seen 

 under a lens the basal and apical part of the wing is pure gold, the 

 intervening space coppery, but the reflections are so strong on both 

 colors that the entire wing sometimes appears all gold, while in other 

 lights the cupreous predominates. From the base is an elongated, 

 costal, black streak, extending nearh^ one-fourth of the wing and inter- 

 rupted before the middle by two golden dots. ^Vbout the middle of 

 the wing is another elongated, narrow, subcostal black streak with 

 bright metallic blue reflections. Opposite it, on the dorsal edge, 

 begins a third elongated black streak, extending obliquely upward 

 and outward nearly to the costal margin, and from there to apex. 

 The portion of the wing below and outside this line is in some lights 

 dusky black with bright golden streaks, but in other lights the black is 

 obliterated by the strong golden reflections. Cilia and hindwings 

 dark grey, with bronze reflections. Abdomen dark fuscous, with 

 bronzy reflections. Legs golden; posterior tibite clothed with rather 

 short, stiff, spiny hairs above; middle tibia^ smooth; underside of 

 bod}' silvery white. 



Alar expanse, 8 mm. 



Described from a single specimen, bred Fe])ruarv t^T, 19»)0. from 

 mastic {Slderoxylon palUduin) collected at Palm Beach, Florida, hy 

 Dr. Dyar. 



7}//..— No. 4960, U.S.N.M. 



I am not acquainted with this genus except through Lord Walsing- 

 ham's description, but I have little doubt that this species belongs to 



