I 



NEW MICROLEPIDOPTERA FROM HAWAII 105 



The genus is allied to Coelopoeta Walsingham, but differs in having 

 vein 5 of the forewing free and in having the ceU in the hindwings closed 

 and veins 2 to 5 separate. 



Petrochroa swezeyi, new species. 



Labial palpi light ochreous with tip of terminal joint black. Face, 

 head, and thorax dusky brownish ochreous, with a strong iridescent sheen. 

 Antennae dark brown, sprinkled with light ochreous on the terminal joints. 

 Forewings dark brownish fuscous with an ill-defined, whitish ochreous 

 costal spot at apical third faintly connected across the wing with an oppo- 

 site similar dorsal spot ; cilia lighter ochreous fuscous. Hindwings uni- 

 formly light fuscous with concolorous cilia ; in the males with a strong tuft 

 of broad scale-like hairs at the base of costa. Abdomen silvery fuscous. 

 Legs dark brown with narrow light ochreous annulations on the tibiae 

 and on the tarsal joints. 



Alar expanse, 7-8 mm. 



Habitat: Kaimuki, Oahu, Hawaii. 



Type, Cat. No. 18430, U. S. Nat. Mus. 



Named in honor of the industrious collector, Mr. Otto H. Swezey, 

 who bred this species from small cases found on rocks. 



The cases are made of tough silk and completely covered with small 

 particles of sand and rock, which give a dark reddish brown color to the 

 specimen before me. The cases are 4.5 mm. long and 2 mm. broad, 

 somewhat flattened and with a transverse slit in one end. 



Petrochroa dimorpha, new species. 



Labial palpi light ochreous, strongly shaded externally with black. 

 Face and head light ochreous. Antennae light ochreous, in the females 

 annulated with dark brown through the entire length, in the males annu- 

 lated with dark brown only on outer two-thirds ; basal pecten long, black. 

 Thorax light ochreous with dark brown patagia. Forewing dark brown 

 on the costal two-thirds, light ochreous on the dorsal edge ; a short, lon- 

 gitudinal, black streak a little before the middle of the wing on the bor- 

 der line of the two colors ; a large, round, black spot at the end of the 

 cell slightly edged with white scales. Cilia ochreous. Hindwings light 

 silvery fuscous, with ochreous cilia ; in the males with costal tuft of stiff 

 hairs. Abdomen dark silvery fuscous above, ochreous on the underside. 

 Male aneJ tufts large, ochreous. Legs straw-colored with black bars and 

 annulations. 



