INSECUTOR INSCITI^ MENSTRUUS 217 



Spots. Hind wings white; small paired smoky spots terminally 

 at veins. Fore wings below silvery gray showing the markings 

 of upper side; some whitish yellow spots on costa; a dark 

 terminal line. Hind wings below silvery white thinly irrorated 

 with avellaneous ; a very faint postmedial line ; a fine terminal 

 line. 



Expanse, 24 mm. 



Habitat. — Popocatepetl Park, Mexico. 



Type.— Cat. No. 25641, U. S. Nat. Mus. 



Hydriomena sylvaria, new species. 



Male. — Palpi fuscous. Head, collar, and thorax white, the 

 patagia mottled with gray. Abdomen buff white dorsally tinged 

 with gray leaving the segmental lines white ; underneath silvery 

 white. Fore wings brownish drab, the markings grape green ; 

 an outbent subbasal fascia followed by some black irrorations ; 

 an elongate antemedial spot on costa, and a faint double black 

 line ; a medial costal spot and a double, well separated black 

 line from subcostal slightly outcurved to inner margin ; post- 

 medial line similar edging the costal spot, and faintly filled in 

 with grape green to inner margin ; subterminal outbent at vein 

 7, fine, black, lunular dentate, broadly edged outwardly with 

 grape green ; cilia with some greenish spots at base. Hind 

 wings white faintly tinged with drab ; traces of a subterminal 

 grayish shade ; cilia white with dark points. Fore wings below 

 drab gray ; a yellow white postmedial costal spot, and a smaller 

 subterminal spot; cilia white at base interrupted by fuscous 

 spots and with dark tips. Hind wings below white with a few 

 avellaneous irrorations, and black spots on cilia. 



Female. — The basal fascia brighter, whiter, outwardly edged 

 by a black line ; the medial lines on inner margin suffusing and 

 forming a black patch ; beyond medial costal spot an irregular 

 white spot to discocellular at vein 4 ; a round white spot circled 

 with black between veins 2 and 3 near cell ; postmedial obso- 

 lescent except on costa and from vein 2 to inner margin where 

 it is outbent ; the marginal green shade edged on both sides 

 with black, brighter than in male. 



