136 INSECUTOR INSCITL^ MENSTRUUS 



outer half of wing a shade darker than inner half; a small 

 round discal dot. Expanse, 37 mm. Male antennas with long 

 pectinations except at the tips. 



Type, male, No.-21738, U. S. Nat. Mus. ; Zacualpan, Mexico, 

 August, 1914 (R. Miiller). 



Therina negata, new species. 



Wings thin, light brown, irrorate with ocher and purple 

 scales ; lines indicated by purple dots on the veins, followed by 

 ocher; discal dot a trace. Hind wing similar, with single 

 mesial line of dots. Expanse, 33 mm. 



Type, male. No. 21739, U. S. Nat. Mus. ; Zacualpan, Mexico, 

 October, 1917 (R. Miiller). 



Subfamily ACIDALUN^ 



Semaeopus concatenans, new species. 



Dull ocher, irrorate with purplish ; fore wing with three 

 lines, hind wing with two, pale purplish, wavy and denticulate ; 

 discal dots on both wings moderate, rounded, of black and 

 purple scales. Expanse, 26 mm. 



Type, male. No. 21740, U. S. Nat. Mus. ; Zacualpan, Mexico, 

 October, 1917 (R. Miiller). 



Near S. citrina Druce, slenderer, less yellow, the lines thicker 

 although not darker. 



Semaeopus discosa, new species. 



Dark ocher, the wings finely irrorate with purplish ; lines 

 distinct, dull purplish, wavy and denticulate ; discal spots of 

 both wings large, round, dull purple irrorated with lilaceous, 

 followed each by a purplish cloud that fills in the bend of the 

 median line. Expanse, 29 mm. 



Type, male. No. 21741, U. S. Nat. Mus.; Zacualpan, Mexico, 

 October, 1917 (R. Miiller). 



This may be a heavily marked variety of S. citrina Druce. 



Subfamily LARENTIIN^ 



Mesoleuca platymesa, new species. 



Head, thorax and base of abdomen blackish, the rest of ab- 

 domen white ; wings white, the basal fourth of fore wing 



