178 [March 



|J With a disco-central nervule. 



Antennae deeply pectinate ; wings limpid ; 9 apterous. F. w. submedian with 



branches. Psychidae. 



Antennse shortly pectinate ; body metallic. F. w. neuration sphingiform. 



Glaucopididae. 

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

 f Subcostal bifid. With disco-central nervule. 

 Antennse pectinate; wings often limpid or with limpid spots. Glaucopididae. 

 Submedian distinct, internal obsolete. 

 •j" Median vein 2-branched. The females of genus Dineurodes. 

 ff Median vein 3 or 4-branched. 

 Subcostal trifid, furcate at base;* discal vein with or without nervule. 

 F. w. with one or more areoles. Wings thin. Body slender. Geometridae. 



Submedian and internal veins obsolete. 



Subcostal and median 3-branched ; with disco-central. Sexual peculiarity among 



9 of Eubolides. Geometridae. 



HIND WINGS WITH A COSTAL VEIN. 

 § 1. With an intercostal cell. 

 ■|" With an internal vein. 

 Median 3 or 4-branched. Subcostal bifid. 

 Lower branch of subcostal angulated ; costal furcate at base. 

 Antennae fusiform. F. w. with nervules radiating from the disk. Zygaenidae. 



Lower branch not angulated ; costal simple at base. 

 Antennse fusiform, setigerous, sometimes ciliated. F. w. with subcostal nervules 

 aggregated. _ Sphingidae. 



■j""}" Without an internal vein. 

 Median vein 3-branched. 

 Subcostal simple; discal vein with angle pointing outward, with a nervule. 

 Subcostal bifid, discal vein curved, with disco-central. 



Wings thin, delicate ; h. w. angulated at apical nervule. F. w. with two areoles. 



Geometridae. 



§ 2. Without an intercostal cell. 

 ^ Hind wings '%vitIiout an internal vein. 



Hind wings with a tail-like appendage. 



Median 3-branched. Subcostal bifid. 

 Disk closed, with disco-central. F. w. with costal vein simple; subcosto-inferior 

 simple. Sematuridae. 



Hind wings without tail-like appendage. 

 Median 3-branched. Suboostal bifid. Costal and sub- 

 costal pendiculate. 

 Body slender. Wings thin. F. w. often with an areole. Geometridae. 



* Properly considered, the costal and subcostal are partly soldered together, but 

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



