54 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
posterior patch; pinaculum of setae Ila-IIb with pigmentation 
stronger and more extensive, restricted to lower portion of pinaculum, 
crescent shaped; pinacula of setae III, IV-V, and VI nonpigmented 
or pigmented at margin only. Abdominal segments 1-7: pigmenta- 
tion of pinaculum of setae I similar to that of setae [A-IB of meso- 
and metathorax; pigmentation of pinaculum of seta II stronger than 
that of seta I, constricted at middle; pigmentation of seta II similar 
to that of setae Ila-IIb of meso- and metathorax; pinacula below 
level of spiracle with pigmentation restricted to marginal area or 
absent. Abdominal segment 8: pigmentation of pinacula of setae I 
and II more extensive than on anterior segments, usually not inter- 
rupted on margins but with large central area not pigmented; pina- 
culum of seta III complete, except for small area at base of seta. 
Abdominal segment 9: pigmentation of pinaculum of paired setae 
II stronger on anterior and lateral margins, central area and posterior 
margin with pigmentation obsolescent or absent; pinaculum of setae 
I-III with pigmentation complete, except for small area at base of 
setae; pinacula of setae VI, VII and VIII nonpigmented. Anal 
shield with pigmentation of pattern variable. 
Typres.—Location uncertain: bifidalis. British Museum (Nat. 
Hist.): inornatalis. Museum Natural Sciences Argentina: evanidalis, 
obsoletalis. U.S. National Museum: stolidalis, USNM 34632. 
TYPE-LOCALITIES.—‘Americae Insulis,” bifidalis. St. Domingo: 
inornatalis. Argentina, Buenos Aires: evanidalis, obsoletalis. Puerto 
Rico, Ensenada: stolidalis. 
Foop pLants.—Cotton, purslane. 
DistTRIBUTION.—CANADA: Alberta. UNITED sTATEs: Arizona, New 
Mexico, Texas. mexico: Colima, Oaxaca, Vera Cruz, Morelos. 
GUATEMALA: Cayuga. PANAMA: La Chorrera. VENEZUELA: Aroa. 
coLoMBIA: Tolima. PERU: Lima. BRaziu: Rio Gran do Sul. ARGEN- 
TINA: Santa Fe, Tucuman. paraauay: Villarica. WEST INDIES: 
St. Croix, Jamaica, Puerto Rico. 
SPECIMENS EXAMINED.—179. 
In FLigHT.—February to December. 
RemARKs.—The inwardly oblique brownish or somewhat fuscous 
diffuse bandlike marking which extends from the apex of the forewing 
to the outer angle of the cell, thence fused with the posterior trans- 
verse line to the inner margin of the wing, distinguishes bifidalis from 
the other species heretofore treated herein; it is usually weaker 
in the males, and is often obsolescent but with remnants discernible. 
The genitalia of stolidalis Schaus were dissected and they are 
within the range of interspecific variation of bifidalis. 
