march, 1864. 247 



very short and placed near the basal angle and is branchless. 

 The subcostal vein is attenuated towards its base, is adjacent 

 to the costa, distinct in the basal third of the wing, and runs 

 through the middle of the setiform portion and is likewise 

 branchless. 



The fore-wings are narrowly lanceolate. The subcostal 

 vein is attenuated towards the base, is placed near the costa 

 and without branches. The median vein is distinct and 

 placed in the middle of the wing ; it is delivered to the acute 

 tip of the wing, near which it is probably furcate, sending a 

 very short, indistinct branch to the costa, which however can 

 scarcely be seen under a ■£■§ inch lens. The submedian vein is 

 obsolete. 



Head smooth, with appressed scales. Face and forehead 

 broad. Antenna? setaceous, short, slightly more than one- 

 half so long as the body. Labial palpi short, separated ; in 

 the living imago, ascending but scarcely reaching to the 

 middle of the face, slightly curved, slender, smooth and 

 pointed ; in dead specimens the palpi are depressed and much 

 divergent laterally; the terminal joint is very short and in- 

 distinct. No maxillary palpi. Tongue naked, short, rather 

 longer than the face. 



When at rest the imago holds the posterior pair of legs 

 elevated at the sides above the wings, and in walking — its 

 motions are very active — uses them by making very rapid 

 vibrations, during which they touch the surface for only an 

 instant. The femora and tibia? of the posterior legs are not 

 hairy, but quite densely clothed with spines, and the feet of 

 this pair appear to be without hooks. The antennas are por- 

 rected. 



The mine of the larva is like that of an Elachista, begin- 

 ning as a long threadlike line and towards the latter part of 

 larval life is enlarged into a blotch. When it has reached 

 maturity, it cuts a perfectly circular disk from the upper 

 cuticle of the leaf, folds it along its diameter and unites the 

 edges of the circumference, so as to make a semicircle. 

 When completed the larva, enclosed in its semi-circular co- 



