OF WASHINGTON. 97 



Claremont, Cal. (C. F. Baker). 



Type. No. 9902, U. S. National Museum. 



This is a brilliant little moth of iridescent golden and silvery 

 scales, nearest to Mompha sexnotella Chambers. Venation 

 and oral characters typical. 



Family TINEIDJE. 



Marmara opuntiella, n. sp. 



Face and head silvery white. Antennae fuscous. Labial palpi white, 

 with apex of second joint and a ring around terminal joint black. 

 Maxillary palpi yellowish. Thorax and fore wings yellowish fuscous 

 mottled with black; at basal third of fore wing is a narrow straight 

 transverse white fascia, edged basally with black; at the middle of the 

 wing is a similar slightly oblique white fascia and at apical third are 

 a costal and an opposite dorsal white spot nearly reaching each other; 

 just before apex is a white costal spot. Hind wings dark fuscous. 

 Abdomen fuscous, with ochreous anal appendages. Legs white, with 

 black annulations. 



Alar expanse, 7-8 mm. 



Southern Texas. Foodplant, Opuntia sp. 



Type. No. 9903, U. S. National Museum. 



Bred by Mr. E. S. G. Titus in the Insectary of the U. S. De 

 partment of Agriculture from an Opuntia received during the 

 winter of 1904-5. The larva mines just under the epidermis, 

 making a long winding serpentine mine sometimes widened out 

 into irregular blotches. The larva, like those of the other 

 species of the genus, is footless, much flattened and incised be 

 tween the joints while in the mine. At the last larval molt it 

 assumes the cylindrical form with normal legs and spins the 

 characteristic cocoon with the peculiar globular ornamentations, 

 as do the other species of the genus. 



Ectoedemia, n. gen. 



Head and face tufted. Antennas , simple in both sexes, rather 

 thick; basal joint concave and dilated to form a small, strongly scaled 

 eye-cap. Labial palpi well developed, porrected. Maxillary palpi long, 

 folded. Tongue obsolete. Fore wings elongate-ovate, pointed, thickly 

 clothed with scales ; 8 veins, veins 3, 4, 5, and 9 absent ; cell very short, 

 closed ; 6 to termen ; 7 and 8 stalked to costa, with stalk out of 6 ; ib 

 simple at base. Hind wings nearly as long and ^ as wide as fore 

 wings, elongate-ovate, pointed ; 5 veins, veins 3, 4, and 5 absent ; cell 

 open between 2 and 6; 6 and 7 stalked from basal fourth of the wing, 

 diverging widely, one running along costal and one along dorsal edge 



