76 ILLUSTRATIONS OF UNFIGURED LEPIDOPTERA. 



Syrichthus nigella A. G. Weeks, Jr. 1 

 (Plate XXIX, Figure j.) 



Habitat : Sicasica, Bolivia. Expanse : .80 inch. 



Head, thorax, abdomen and antennae, above, black; beneath, nearly 

 white. Club, above, black; beneath, reddish brown. Legs white. 



Ground color of fore wing nearly black. Basal area and costa near base 

 dusted with whitish scales. In subcostal interspaces near apex, are three 

 white spots. Below these in next two interspaces, are two white spots 

 nearer hind margin. In interspace below these, is one white spot nearer 

 base, and under the first mentioned subcostal spots. In the next three 

 lower interspaces down to submedian nervure, are three larger white 

 spots, a little nearer base. Nearer costa midway between apex and base 

 is a white dash, and under it, at end of discoidal space, a white spot. Be- 

 low this in next two interspaces are two white spots, the lower resting on 

 submedian nervure and nearer base. The hind marginal fringe is very 

 pronounced, narrower at apex than at lower angle and of pure white. 

 Inner margin edged with white. 



Upper side of hind wing of same ground color. Running from centre 

 of costa across centre of wing and ending at submedian nervure, is a 

 broad band of white with irregular edges. At its central portion it 

 broadens or suffuses strongly toward the base through the discoidal 

 space. Outside of this band, the area to hind margin is nearly black, with 

 a line of interspacial white dots. The marginal fringe is very heavy and 

 pure white. Inner margin edged with white. 



The spots* and white markings of upper surface are very distinctly 

 marked, showing scarcely any suffusion. 



The general color of the under surface is white, with black or dark 

 markings. 



On fore wing the white spots of upper surface are repeated. The costa 

 midway to apex is distinctly white. The area near costa between the 

 two rows of white spots is dark brownish, the darkest portion of the wing. 

 The space below lower submedian nervule to inner margin is grayish white. 

 The hind margin is touched slightly with brownish. The fringe is white. 



Under side of hind wing white. Across apical area, is a dash of black. 

 There is a prominent dash of black running from median nervure near 

 the hind margin across to submedian nervure. Above this and parallel 

 to it, in centre of the wing, is a short black dash. In subcostal area over 

 the discoidal space are two black spots, and another at the base. Inner 

 marginal area tends to grayish. 



Taken in October, 1899. 



1 Entomological News, Vol. XIII, No. 4, p. 107, April, 1902. 



