82 INSECUTOR INSCITI^ MENSTRUUS 



Type, female, No. 22125, U. S. Nat. Mus.; Zacualpan, 

 Mexico, September, 1918 (R. Muller). 



Mystomemia hortealis, new genus and species. 



Fore wing with single areole, veins 8-10 stalked from it ; 

 male palpi with the first joint upcurved, then sharply reflexed, 

 reaching back to end of thorax ; antennae with long bristles 

 from short serrations ; a long area with hair-like scales at about 

 the outer third, but no defined tuft. 



Fore wing dark brown, the terminal area violaceous gray, 

 contrasting ; orbicular and renif orm white points in black 

 clouds with diffused edges ; lines obscure, whitish, wavy, the 

 outer excurved over cell ; a nearly straight whitish subterminal 

 line bounding the terminal space; a black crenulate terminal 

 line. Hind wing blackish gray, darker outwardly ; a terminal 

 line as on fore wing. Expanse, 39 mm. 



Type, male, No. 22022, U. S. Nat. Mus. ; Zacualpan, Mexico, 

 June, 1918 (R. Muller). 



NOTODONTID^ 



Dicentria phthimena, new species. 



Very close to D. moribunda Dyar, from the same locality. 

 The fore wings seem narrower ; the pale area below the cell 

 is not sharply limited below, but extends across the median 

 vein ; the pale terminal streak above vein 2 is linear and more 

 oblique ; the hind wings are whitish only mesially, the apex 

 and inner area being broadly shaded with grayish and brown. 

 Expanse, 38 mm. 



Type, male. No. 22023, U. S. Nat. Mus. ; Zacualpan, Mexico, 

 July, 1918 (R. Miiller). 



GEOMETRID^ 



Molybdogompha polymygmata, new species. 



Wings olive-gray, finely and densely striated with raised 

 pale scales subterminally on fore wing and over most of the 

 medial area of hind wing; fore wing diluted with reddish 

 patches basally and two illy defined yellow patches on costa ; 



