Group II 



[Hind wing with vein 3 present, 4 absent.] 



Keys to the venational divisions and genera of group II 



Forewing with 11 veins; vein 2 from the cell Venational division A (key, p. 180) 



Forewing with 11, 10, or 9 veins; vein 2 stalked or united with 3. 



Venational division B° (key, p. 184) 



Forewing with 10 veins; veins 8 and 9 united'"; 4 and 5 stalked; 2 from the cell or [Azaera] 



from the stalk of 4-5 Venational division C (key, p. 184) 



Forewing with 10 veins; 8 and 9 stalked; 4 and 5 united; 2 from the cell. 



Venational division D (key, p. 185) 



Forewing with 9 veins; 8 and 9 united"; 4 and 5 united; 2 and 3 from the cell. 



Venational division E (key, p. 185) 

 Foremng with 9 veins; 8 and 9 united; 4 absent; 3 and 5 stalked; 2 from the cell. 



Venational division F (key, p. 186) 

 Venational division A 



1 . CeU of hind wing partially open ; only a fragment of the discocellular vein distinguishable. 



Psorosina (p. 208) 

 Cell closed; discocellular vein complete and curved 2 



2. Hind wing with vein 2 from lower outer angle of cell 3 



Hind wing with vein 2 from before the angle 8 



3. Forewing with vein 2 from the lower outer angle of cell Honora (p. 196) 



Forewing with vein 2 from before the angle 4 



4. Forewing with vein 2 from well before the angle; eighth abdominal segment of male 



without hair tufts; transtilla absent (elements not distinguishable); ductus bursae 



sclerotized for most of its length Ulatila (p. 263) 



Forewing with vein 2 from near lower angle; eighth abdominal segment of male with 

 hair tufts; transtilla present (represented at least by distinguishable elements); 

 ductus bursae membranous 5 



5. Labial palpus upturned; maxillary palpus of male squamous; signum of female a de- 



pressed, small cluster of blunt, stout, thornlike spines . . . Drescomopsis (p. 262) 



Labial palpus oblique; maxillarj'- palpus of male in the form of an aigrette; signum or 



signa of female otherwise 6 



6. Male genitalia with apical process of gnathos on ovate plate bearing a small spine; 



signa of female consisting of a chain of thornlike spines on bulbous bases and a 



scattering of similar spines Cabotia (p. 200) 



Male genitalia with apical process of gnathos a stout, elongate hook; signa of female 

 consisting of large, round, densely spined plates 7 



' The genus Nonia in this division could easilj' be confused on forewing venation with the species and 

 genera of division F. However, in Nonia it is vein 2 that is absent (united with 3) and 4 and 5 that are 

 stalked; while in group F vein 2 is present, 4 absent, and 3 stalked with 5, two radically different developments 

 to the same end result. The genitalia of Nonia show its close relationship to forms with veins 2 and 3 stalked 

 and vein 2 tending to disappear. 



" In occasional specimens of Vitula a vestige of vein 9 may be present on one forewing or the other, 

 but the normal condition is for vein 9 to be absent. 



" Some specimens of Bema show a trace of vein 9 on one side or the other, but this is an abnormal 

 condition. 

 180 



