530 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 38. 



tion in all the species of the genus, where veins 2 and 3 arc always 

 closer together in the males than in the females. Abdomen and 

 legs blackish brown. Ovipositor protruding, horny, reddish. Male 

 claspers likewise red and horny. 



Alar expanse, 30-32 mm. 



Habitat. — Juan Vinas, Sixola Kiver, and Tuis, Costa Rica. William 

 Schaus, coll. 



Type.— Oat. No. 13154, U.S.N.M. Cotype in British Museum. 



Though not unicolored, this species, nevertheless, belongs nearest 

 to the unicolored group of the genus and forms an intermediate link 

 between this and the spotted group. The species is nearest in size 

 and in ground-color to In pltsestiella Zeller, from which it is at once 

 separated by the ornamentation. 



TRICHOSTIBAS VENATELLA, new species. 



Labial palpi, face, head, and antenna? bluish black. Thorax 

 bluish or greenish black, with two large oval white spots; patagina 

 bluish black. Forewings blackish brown, with strong metallic blue 

 and green sheen and with dirty white markings, as follows: across 

 the wing near the base is a row of three irregular round white spots, 

 an upper near to but not touching the costal edge, a lower near to 

 but not touching the dorsal v(\^c, and a somewhat larger central 

 spot. Just beyond the middle of the wing is a broad band of white, 

 broken up by the black veins into seven irregular oblong spots; one 

 between the costal edge and vein 11; one between vein 11 and vein 

 10; one on the small cell cut off by the internal vein; one, the larg- 

 est, on the main cell; one between this and vein 2; one between 

 vein 2 and the fold, and one elongate pointed white spot between 

 the latter and the dorsal edge. All the intervals between the apical 

 and terminal veins dirty white; the veins themselves black. Entire 

 edge of the wing narrowly black. Cilia blackish brown. Hind- 

 wing dark fuscous, but rather transparent on the basal half, more 

 or less opaque on the outer half. Abdomen bluish black. Ovi- 

 positor horny, protruding, reddish. 



Alar expanse, :'.() .".1 mm. 



Habitat, ('astro, Parana, Brazil. "William Schaus, coll. 



Type.— Cat. No. 13 153, U.S.N.M. 



This is one of the easily distinguished spotted group of species in 

 the genus and the largest described species of that group. It is 

 nearest to and greatly resembles T. iopldebia Zeller, but is larger, 

 darker, bluish black instead of violet, and has the white portion of 

 the wing much more restricted than Zeller' s species. In this latter 

 particular, as well as in general habitus, it is much like '/'. imitans 

 Felder, but is a larger and darker form than that species. 



