80 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



Type: Mexico, Orizaba (no date, Wm. Schaus), USNM 66378. 



The structure of the genitaha suggests that excavata, jimhriata and 

 hyptiotes are closely related, but jimhriata lacks the excised costa 

 of forewing of the other two. The unusually broad ostium and the 

 signum of hyptiotes distinguish it from excavata. In superficial ap- 

 pearance excavatamost nearly resembles 0. rhacina Walsingham, which, 

 however, lacks the row of white subterminal dashes characteristic 

 of the former species. Also, the hind wing of excavata is paler than 

 that of rhacina. 



Gonionota hyptiotes, new species 



Figure 7/; Plate 3 (Fig. 6) 



Alan expanse 24 mm. 



Labial palpus buckthorn brown; outer side of second segment 

 sparsely irrorate with fuscous, inner side with some white scaling and 

 tinged with pink; posterior edge white basally; third segment white 

 posteriorly, subapical tuft fuscous. Antennal scape buckthorn brown 

 dorsally, white ventrally ; remainder of antenna brown dorsally shading 

 to grayish fuscous distally. Head and thorax dull ocherous; tegula 

 brownish basally. Forewing ground color buckthorn brown; basal 

 fifth to costal edge of cell at two-fifths dull ocherous; from two-fifths 

 of costa a transverse bar of dull ocherous extends toward outer extrem- 

 ity of basal patch but is interrupted by ground color; basal patch 

 divided at middle by a transverse line of ground color; on outer margin 

 of basal patch, in cell, two small clusters of fuscous scales; at end of cell 

 a fuscous spot surrounded by ocherous; costa deeply excised at outer 

 third, edged with white; inner margin of white edge very narrowly 

 ocherous ; costa fuscous before and after white-edged excision ; dorsum 

 broadly edged with fuscous; in terminal third scattered, ill-defined 

 fuscous spots; cilia grayish fuscous. Hind wing ocherous white 

 basally, shading to brown apically; in anal area considerable grayish 

 fuscous scaling; cilia ocherous white shading to grayish fuscous 

 around termen to apex. Legs ocherous white irrorate with brown 

 and fuscous. Abdomen ocherous white with sparse fuscous irrora- 

 tion ventrally; dorsally brownish buff. 



Female genitalia: Ostium extremely broad, opening into the scle- 

 rotized portion of ductus bm'sae on left side. Ductus bursae very 

 short, sclerotized for about half its length, the sclerotized part dilated 

 and convoluted; inception of ductus seminalis on right side. Signum 

 approximately diamond-shaped. 



Slide examined: 9, JFGC no. 11103. 



Type: Mexico, Orizaba (Sept. 10, K. MuUer), USNM 66380. 



Described from the unique female type. 



