MARCH, 1862. 201 



F. w. subcostal exterior to the disk 4-branched ; fold thickened ; 

 submedian doubly furcate. Bombycidse (Gen. Pimela). 



Hind-wings, costa not dilated at the base. 

 Subcostal bifid. Lower branch not decidedly angulated. 

 Without disco-central. Antenna? incrassated at the tip, 

 shortly pectinate. Zygsenidse. 



Antennas setaceous, pectinate ; body often metallic. 

 Subcostal bifid. Lower branch decidedly angulated.^ 

 With disco-central, antennas pectinate; wings slightly 



diaphanous. Ctenuchidse. 



* * Median vein 3-branched. 



f Subcostal trifid. With a disco-central nervule. 

 Antennas setiform ; wings semi-diaphanous. (Nudaria ? C. ) 



Litnosidse. 

 X Without disco-central nervule. 

 Wings with marginal gemmated spots. (A remarkable ex- 

 ception.) Pyralidse. 

 F. w. with a broad stripe; f. w. neuration sphingiform 

 (Ormetlca, C.) Glaucopididse. 

 f f Subcostal bifid. Without disco-central. 

 Antennas minutely pectinated; f. w. subcostal branches 

 separated. Lycomorphidse. 

 J J With a disco-central nervule. 

 Antennas deeply pectinate; wings limpid; ¥ apterous. ^ F. 

 w. submedian with branches. Psychidse. 

 Antennas shortly pectinate; body metallic. F. w. neuration 



sphingiform. Glaucopididse. 



* * * Median bifid, lower branch furcate at tip. 



f Subcostal bifid. With disco-central nervule. 

 Antennas pectinate; wings often limpid or with limpid spots. 



Glaucopididse. 



Submedian distinct, internal obsolete. 



f Median vein 2-branched. The females of the 



genus Dineurodes. 

 I f Median vein 3 or 4-branched. 

 Subcostal trifid, furcate at base;* discal vein with or with- 

 out nervule. 

 » Properly considered, the costal and subcostal are partly soldered together, 

 but the formation might be mistaken for a trifid vein by a novice. 



