AMKKU'AN LKIMDOl'TERA. 24i) 



though in this opinion I have the sympathy of very few, W, indeed, 

 of any otlier Lepi(h)pteri.sts. 



GEOMETRINA. 



Synopsis of families and subfamilies. 



Hind wings vein 5 present, strong GEOMETKID^E. 



Hind wings vein absent, or a fold only ENXOMJD^iC. 



HEOMKnUDJE. 



1. All wiiifis with vein 5 nearer b than 4 GkomktkiN'^. 



Fore or hind winjis with vein 5 at middle of cell, or nearer 4 than 6 2. 



2. Hind winfjs vein 8 coalescing with cell to middle, or if separate, joined with 



it hy a cross-bar at or beyond middle 3. 



Hind wings vein 8 sejiarate from cell or joined at or near base only 4. 



3. Frenulum present HydkiomiNjE. 



Frenulum absent. Dvsptkkidin^. 



4. Hind wings 8 shortly joined with cell at or near base ~\ 



Hind wings 8 separate from cell (J. 



5. Hind wings joined with cell near base, shortly, then rapidly diverging. 



8TKRRHIN.*:. 



Hind wings 8 joined with cell at base, then sub])arallel with it. 



MoXOlTEXIIN.'E. 



6. Fore wings 7 separate from both 8 and !) 7. 



Fore wings 7 stemmed with 8 and 9 BRKPHiNiK. 



7. Fore wings 8 stemmed with 9 Strophidiin.*;. 



Fore wings 9 separate from 8 Leuculin^. 



ENNOMID.E. 



1. Hind wings 8 coalescing with cell at base Fern.\ldeli,ix.k. 



Hind wings 8 separate from cell 2. 



2. Frenulum pre^sent 3. 



Frenulum absent Palvadin.k. 



3. Antennte and legs very long; anteniue three-fourths length of fore wings. 



MECOCERATINJi. 



AntemiiB and legs normal; antenna? never more than two-thirds length of 

 fore wings 4. 



4. Fore wings 7 separate from 8 and 9 ' Melanchroiin.e. 



Fore wings 7 stemmed with 8 and 9 Kxxomin.e. 



I)v.si"n:Hii)rN.E. 

 The Dyspteridintc, with the Hydrioniinie, are easily separated from 

 the rest of the Geometrina by the coalescing of vein 8 of the hind 

 wings with the cell for half or more of its length, or in exceptional 

 cases in both subfamilies, where 8 does not coalesce with the cell, it 

 is joined by a cross-vein to the cell at or beyond its middle. In 

 both subfamilies vein 5 of the hind wings is developed. The two 



TRANS. AM. E.ST. .SOC. XXIII. (32) JULY, 1896 



