SOME AMERICAN GEOMETRID MOTHS — CAPPS 119 



a red-brown tinge, Fore wing with the transverse anterior line evenly 

 curved; transverse posterior line straight from costa to vein 6 and 

 then slightly angled inwardly to inner margin. Medial transverse 

 line of the hind wing straight or very slightly curved. All lines testa- 

 ceous edged with yellow. 



Alar expanse, 29-34 mm. 



Genitalia (figs. 5-5 A) : Uncus a strong hook, gradually expanding 

 basally; harpe simple, rather stout, costa short, its length less than 

 width of harpe at base ; furca extending to or beyond costa of harpe, 

 distal end bent mesad, angled portion armed with numerous fine 

 spines; aedeagus with a narrow extenuated plate distally and a large 

 patch of long slender cornuti. 



Female. — Similar to the male in color and markings. 



Alar expense, 32-36 mm. 



Genitalia (figs. 27-27A) : Ventral operculum moderately sclerotized, 

 weaker posteriorly; ductus bursae rather long, more than twice the 

 length of internal band near junction with the bursa ; bursa narrow, 

 elongate ; signum a narrow spinose plate. 



Type.— U.S.N.M. No. 31153. 



Type locality. — Lino, Panama. 



Food plant. — Unknown. 



Distribution. — Costa Rica : Juan Vinas (Jan., June) . Guatemala : 

 Chejel (June), Guatemala City (June). Mexico: Jalapa, Orizaba 

 ( Sept. ) . Panama : Lino. 



Nine specimens examined. 



Remarks. — As stated previously, the genitalic structures are ex- 

 tremely variable for the whole group. Figures 5B and 5C indicate 

 the intraspecific variation of the gnathos and furca for this species. 



2. NEOTHERINA IMPER1LLA (Dognin), new combination 



Plate 2, Figure 6, 6A 



Neplwdia imperilla Dognin, Het£roceres nouveaux de l'Aruerique du Sud, fasc. 

 4, p. 21, 1911. 



Male. — Front pale brown, slightly ocherous; abdomen and wings 

 gray-brown with a slight redd ish tinge. Fore wing with two testaceous 

 transverse lines; transverse anterior line evenly curved; transverse 

 posterior line straight from costa to vein 6 and then evenly bent 

 inwardly to inner margin. Hind wing with a postmedial line, evenly 

 curved, well beyond outer angle of the discal cell. 



Alar expanse, 36 mm. 



Genitalia (figs. 6, 6A) similar to those of inconspicua; distal spined 

 portion of furca smaller ; fewer cornuti. 



Female. — Unknown. 



Type.— U.S.N.M. No. 32660. 



