150 WILLIAM T. M. FORBES 



wide. Spiracles small, circular and slightly projecting. Dorsum of 

 abdomen not spinulated. 



The larva and pupae of Bucculatrix and Phyllocnistis are aberrant 

 and are discussed under their genera. 



The family is somewhat heterogeneous and has been divided by some 

 into four or five, in fact one for each really well-marked genus. Buc- 

 culatrix is quite isolated, but its imago agrees with the characters of 

 the family, w r hile Phyllocnistis is practically half way between the 

 Lyonetiidas and the Gracilariida3, showing a mixture of the characters 

 of both in all stages. European workers tend to separate a Lyonetia 

 group from a Cemiostoma (Proleucoptera) group, but there are North 

 American genera which connect the two so well that subfamilies can 

 hardly be made. 



Key to the genera 



1. Vertex rough, bristly, contrasting with lower face. 



2. Eye-cap edged below with a row of strong bristles; cell entirely above middle 

 of wing; wing with a scale -tuft at middle of dorsal margin. 



3. Front running down far below eyes in a blunt point 7. Bucculatrix. 



3. Front short 8. Philonome. 



2. Eye -cap smoothly scaled; cell central in the wing, which is smoothly scaled. 

 3. Four veins running from cell to inner margin. 



4. Hind wing with R, M, and Cu represented by 5 veins 1. Corythophora. 



4. Hind wing with R, M, and Cu represented by four veins. .2. Proleucoptera. 

 3. Three veins from cell to inner margin (figs. 109, 111). 



4. Vertex with a small, fine tuft 4. Lyonetia. 



4. Vertex and upper part of front extremely rough 5. Bedellia. 



1. Entire head smooth. 



2. Palpi moderate; tongue obsolete; eye-cap tending to disappear; fore wing 

 with lanceolate discal cell and no accessory cell (fig. 112) . . .6. Phyllocnistis. 

 2. Palpi minute; tongue present in our species; accessory cell present, but open 

 outward so that R 2 and R 3 are stalked together; hind wing broader, lance- 

 olate (fig. 108) 3. Leucoptera. 



1. CORYTHOPHORA Braun 



Face smooth, with an erect tuft between antennae; antennae four-fifths as long 

 as fore wing; eye-cap pointed anteriorly below; palpi moderate, smooth, droop- 

 ing; maxillary palpi rudimentary. Fore metatarsi thickened with scales; hind 

 tibiae hairy. Fore wing sublanceolate ; Rj absent, R, and R 3 as in Cemiostoma, 

 cell with four posterior veins; tip of 1st A distinct, 2d A simple; hind wing 

 lanceolate, two-thirds as wide as fore wing; veins obsolescent at base; cell open 

 both above and below M; Cu forked; anal region reduced. 



1. C. aurea Braun. Golden yellow; head and appendages very pale, projecting 

 point of eye-cap rather darker; thorax nearly white, with golden tegulae; fore 

 wing becoming deep orange at apex; middle of costal and dorsal margins fading 

 to white; fore tibiae and tarsi dark brown externally. 9-9.5 mm. 



July. 



Southern Ohio; Balsam, North Carolina. 



'* The Gracilariid genus Leucanthiza is likely to run to Lyonetia but is distinguished by its less perf ec t 

 eye-cap, moderately developed paloi. and orange coloring. 



