NO. 1456. NEW GEOMETRID 3fOrHS— WARREN. 413 



In the female the discocelluhir is black, with a faintly pale and 

 roundish space beyond its lower end, corresponding to the extremity 

 of the pale central space of hindwing. 



Under side pale, more slaty black; the white central area of hind- 

 wing more developed and without gray hairs. 



Vertex, head, palpi, and pectus orange; thorax and abdomen like 

 wings. 



Expanse of wings. — Male, 26 mm.; female, 30 mm. 



Localities. — St. Jean, Maroni River, French Guiana; 1 male, March, 

 1904; Rockstone, Essequibo, British Guiana; 1 female, September, 

 1904. 



Type.—C2ii. No. 91T1, U.S.N.M. 



Genus STENOPLASTIS Felder. 

 STENOPLASTIS TRANSVERSA, new species. 



For'ewing. — Black, with the veins pale; a broad transverse yellow 

 band from costa somewhat before middle to inner margin beyond 

 middle; fringe black. 



Hinduiing. — Black; the costa pale from base, ending in a small yel- 

 low blotch representing the end of the band of forewing. 



Under side grayer black; the yellow paler and more extensive. 



Head, palpi, and corslet yellow; thorax and abdomen blacki^li cine- 

 reous; tips of palpi black; under side of abdomen and legs pale gray. 



Expanse of icings. — 27 mm. 



Locality. — St. Jean, Maroni River, French Guiana; 1 male, July, 

 1904. 



Type.—C2it. No. 9172, U.S.N.M. 



Genus XENOMIGIA, ne^A^ genus. 



Forewing. — Costa and hind margin both slightly curved; apex 

 rounded. 



Hindwing. — Ample, wider than forewing and nearly as long; l)oth 

 angles and the hind margin rounded. 



Antenna? of male tuberculate beneath, each tubercle armod on each 

 side with paired fa.scicles of cilia, each er>ding in free cilia; palpi rough, 

 upcurved in front of face; terminal segment obscure; :*^ace narrow, the 

 eyes being large; tongue and frenulum well developed; hind legs 

 broken. 



Neuration. — Forewing, cell longer than half of wing; discocellular 

 short, vertical; the subcostal vein abruptly bent down at end; tirst 

 median nervule at two-thirds, second at five-sixths; radials close 

 together, the upper from the end of the depressed subcostal; veins 

 10, 9, 8, 7 stalked from the bend, 10 very shortly stalked; 9 rising 

 'before the fork of 8, 7, instead of 7 rising before the fork of 8, 9; 11 

 free. 



