LEPIDOPTERA OF NEW YORK AND NEIGHBORING STATES 219 



also stalked; M 3 and Cu x completely united, sometimes lost (A. prae- 

 maturella). Hind wing narrower, lanceolate, with R x strong, but 



FIGS. 128-135. CYCNODIIDJE, DOUGLASIID.E, AND HELIOZELID.E 



128, Cyenodia cygnipennella (North Africa), venation; 129, Aphelosetia argen- 

 tella (Europe), venation; 130, Douglasia ocnerostornella (Europe), venation; 131, 

 Tisnagma, dryadis (Europe), venation; 132, Douglasia balteolella (Europe), seta 

 map of larva; 133, Coptodisca species (on grape), venation; 134, Antispila treit- 

 schkiella (Europe), venation; 135, Heliozela stannella (Europe), venation (after 

 Spuler) 



crowded to extreme base of wing; Sc and R s widely separated, Sc in 

 Aphelosetia ending at middle of costa ; R 2+3 lost in Aphelosetia, present 

 as a short spur in Cyenodia; R 4+5 running to costa near apex, M t (in 

 our species) stalked with it ; M 2 lost in Aphelosetia ; M 3 associated 

 with Cu-stem, the cell usually weakly closed. Anal region reduced. 



This description is based on Aphelosetia, the only genus in eastern 

 North America; in Cyenodia all the veins are present, and R s of the 

 hind w r ing is less widely separated from Sc. Superficially the moths 

 are like Cosmopterygidfe ; but can be distinguished by the radically dif- 

 ferent hind wing; the moderately long, divergent palpi are also rare 

 in the Cosmopterygidae. 



The larvae of Aphelosetia are leaf-miners on various grasses and 

 sedges; they are flattened, with normal mouth-parts and sixteen legs. 

 The mines vary in character, and the frass, unlike that of Cosmopteryx, 

 is left in the mine. The pupa is formed exposed or in a mesh-work 

 cocoon, and is attached by a band around the middle. In several species 

 there are three longitudinal raised dark stripes. All its parts are fused, 



