no. 1765. \i:w MOTHS OF THE GENUS TRWHOSTIB IS -BUSCK. 529 



probably be shaken off by the lusty violent jerks of the pupa, which 

 were observed in the present specimen, whenever it was disturbed. 



I am under obligation to Mr. T. W. Smillie of the U. S. National 

 Museum for the life-sized photograph, which enables me to show the 

 figure of the moth and its cocoon (Plate 35). 



The species is by far the largest described in the genus and very 

 distinct from the unicolored species, to which it conies nearest, by 

 its size, its ornamentation, and its very dark hindwings. 



TRICHOSTIBAS CHIQUITA, new species. 



Labial palpi bluish black. Face and head bluish or greenish black. 

 Antennae deep blue. Thorax greenish black. Forewings unicol- 

 ored, shiny, metallic bluish or violet black; eosta nearly straight, 

 slightly convex on its outer third; apex pointed; termen oblique. 

 Hindwings transparent, sparsely covered with dull black scales; 

 veins black; in the males with a strong, brown hairpencil at base of 

 costa. Abdomen bluish black; ovipositor hardly protruding; male 

 genitalia strongly developed, with long, thin black-scaled claspers 

 and with two expansible tufts of yellow bristles. 



Alar expanse, 20-23 mm. 



Habitat. — Juan Vinas, Tuis, and Florida, Costa Rica. William 

 Schaus, coll. 



Type.— Cat. No. 13152, U.S.N.M. Cotypes in British Museum. 



This is the smallest of the described continental species and comes 

 nearest to the West Indian species, described by Zeller, from which 

 it differs by the darker forewings and by the dark brown costal 

 hairpencil in the males. 



TRICHOSTIBAS COSTARICA, new species. 



Labial palpi blackish brown. Face blackish brown. Antennae 

 dark metallic blue. Head light brown. Thorax light brown, with 

 whitish apex and posterior tip. Forewings deep maroon brown, 

 with a strong purplish sheen and with dirty, brownish white mark- 

 ings. These markings are poorlv defined and are gradually shaded 

 into the dark color: the costal half from base to near apex is unmot- 

 tled dark brown; on the dorsal part of the wing the white predomi- 

 nates and contain a large oval brown spot on vein 1 b at basal third, 

 which, by a narrow oblique brown streak, is connected with the 

 upper dark part near the middle of the wing. From the costal dark 

 part projects a spur downwards at apical fourth, which terminates 

 in a nearly separated round brown spot ; terminal and extreme 

 apical part white; cilia light brown. Hindwings blackish fuscous, 

 semitransparent except- at apex; in the males with a strong, light 

 ochreous, costal tuft. Veins 2 and 3 stalked in the males, separate in 

 the females. This is merely an extreme case of the normal condi- 

 Proc.N.M.vol.38— 10 34 



