800 DESCRIPTIONS OF AUSTRALIAN MICRO-LEPIDOPTERA, 



obsolete towards base of wing. Hindwings with veins 3 and 4 

 stalked, rarely from a point, posterior margin of cell angulated 

 outwards on origin of 5. 



A very distinct and easily recognisable genus of considerable 

 extent, and destined to be largely increased. Although related 

 to Oecophora, it has no immediate connection with that or any 

 other known genus. The very long simple basal joint of antennae, 

 the terminal joint of palpi exceeding the second in length, the 

 obsolescence of the lower fork of vein 1 of the forewings, and the 

 angulated posterior margin of cell and usually stalked veins 3 

 and 4 of the hindwings are peculiarly characteristic points. The 

 species are all elegantly marked with pale spots or fasciae on a 

 dark ground, and often fly in the sunshine, though some appear to 

 be of very retired habit. Many of the larvae are known ; all 

 feed on Leguminosce, and all except one exclusively on species of 

 Acacia, usually between spun leaves or phyllodia. No species are 

 known outside Australia. 

 la. Forewings with silvery-metallic mark- 

 ings 500. constrictella. 



lb. Forewings without metallic markings. 



2a. With two entire anterior fasciie 499. melanargyra. 



2b. Without two entire fasciae. 



3a. Thorax with posterior half white or 



yellowish. 

 4a. Markings of foi'ewings distinctly yellow. 

 5a. With a single yellow band. 



6a. Band nearly parallel-sided 478. monostadia. 



6b. ,, much broadest on costa • 479. euryxantha. 



5b. With additional markings. 



6a. Basal area coppery-fuscous 480. chrysotoxa. 



6b. ,, „ pale yellowish 481. mesoj)ora. 



4b. Markings white or whitish. 



5a. Basal area whitish 482. anemarcha. 



5b. „ „ dark fuscous. 



6a. Median costal spot longitudinally 



elongate 484. desmotoma 



