198 MR, p. WALKER ON SOME TINDESCRIBED 



with cinereous. Fore wings acute, with a black point in the disk ; 

 costa tawny. Length of the body 5 Hues ; of the wings 16 lines. 



MiCRONiA METARGYRiA, F(Km. Nivca, alis lineis duabus pallida 

 fuscescenti-cinereis, alis anticis lineis quinque ; alis posticis subcau- 

 datis, linea 2'' dilatata argenteo marginata, plaga ochracea, maculis 

 duabus atris. 



Female. Pure white. Abdomen much shorter than the interior border 

 of the hind wings. Wings with two pale brownish-cinereous lines ; 

 first line not oblique, extending from a little beyond one-fourth of the 

 length of the costa of the fore wings, abbreviated at some distance 

 from the exterior border of the hind wings ; second at a little beyond 

 three-fourths of the length in the fore wings, very near the border in 

 the hind wings. Fore wings with three additional lines, the first near the 

 base, the second at a little beyond the middle ; the third marginal. 

 Hind wings subcaudate ; second line dilated, including a little silvery 

 streak, bordered by a silvery line, interrupted by an ochraceous patch ; 

 this is connected with two deep-black spots, of which the largest is on 

 the subcaudate angle. Length of the body 6 lines; of the wings 

 21 lines, 



- Gen. IssA. 



Mas. Corpus sat validum. Proboscis brevis. Palpi graciles, ad 

 frontem applicati, verticem non attingeiites ; articulus 8"* mi- 

 nimus. AntenncB serratse, setosse. Abdomen alas posticas non 

 superans ; fasciculus apicalis parvus, subcompressus ; fasciculi 

 duo parvi, ventrales, subapicales. Tihicn deusissime fimbriata3. 

 Alee latae, margine exteriore vix dentatge. Alas anticse vix 

 acutse, margine exteriore subobliquo. Alee posticse margine in- 

 teriore oblique, 



Male. Body moderately stout. Proboscis sbort. Palpi slender, 

 applied to the bead, not rising so high as the vertex; third 

 joint extremely small. Antennae miniitely serrated, densely 

 setose. Abdomen rather shorter than the interior border of 

 the hind wings ; apical tuft small ; slightly compressed ; a tuft 

 on each side beneath near the tip. Legs with very densely 

 fringed tibiae. Wings broad ; exterior border very slightly 

 festooned. Pore wings hardly acute ; exterior border slightly 

 oblique, very slightly rounded. Hind wings with the interior 

 border receding much from the abdomen. 



IsSA MUNDA. Mas. Pallidc flavescenti-cinerea, capite palpisque fuscis ; 

 alis fusco pallido subconspersis, lineis duabus angulosis pallide cervinis, 

 linea marginali fusca, punetis margiualibus nigris ; alis anticis puncto 

 nigro, aUs posticis macula nigra. 



