530 DESCRIPTIONS OP AUSTRALIAN MICRO-LEPIDOPTERA, 



8 stalked, 11 from before middle. Hindwings f-1, elongate-ovate 

 or ovate-lanceolate, cilia |-1 ; sometimes 5 and 6 stalked. 



A large and cosmopolitan genus, being one of the earliest 

 developed forms of the family. The larvae are occasionally but 

 not usually case-bearers ; they often feed on dry refuse, and hence 

 some species have become domestic, and several have thus been 

 introduced into Australia by civilization ; probably a majority 

 feed on lichens or dead wood, but a few eat leaves, and these are 

 sometimes miners within the substance of the leaf : although 

 normally possessed of sixteen legs, some of the leaf-miners are 

 apodal. These variations in habit make the genus a very interest- 

 ing one to study. 



1. Thorax dark fuscous with pale dorsal 



stripe 2. 



Thorax without pale dorsal stripe 10. 



2. Sides of crown sharply dark fuscous 83. erebocosma. 



Sides of crown not dai-k fuscous 3. 



[3. Fore wings with pale costal streak 4. 



Forewings without pale costal streak.... 6. 



4. Fox'ewings with costal streak interrupted 



at 1 87. colleta. 



Forewings with costal streak not inter- 

 rupted 5. 



5. Forewings with upper edge of dark 



median streak projecting at 5 88. acrozyga. 



Forewings with upper edge of dark 



median streak straight throughout... 89. lativittella. 



6. Forewings with pale suffused submedian 



streak 86. chaotica. 



Forewings without pale submedian streak 7. 



7. Forewings with white costal dots or spots 8. 

 Forewings without white costal spots. .. 84. porphyrota. 



8. Forewings with dorsal streak three- 



toothed 85. tridectis. 



Forewings with dorsal streak with more 



than three teeth 9. 



