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. Antennas 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.) 



Lithosidae, 

 J Without disco-central nervule. 



Wings with marginal gemmated spots. (A remarkable ex- 

 ception.) Pyralidse, 



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

 (Ormetica,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. 

 f 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. 



