FAM. GEOMETRIDZE 127 
85. GENUS DICHORDA, WARREN 
Dichorda. Warren, Novit. Zool. Vol. 7, p. 132 (1900) 
Holothalassis. Gumppenberg, Nova Acta Acad. Leop. d. Naturf. lIalle, Vol. 64, p. 5ro (1895) 
(nec Hübner). 
Characters. — Face smooth. Palpus moderate or longish, second joint strongly rough-scaled 
above and beneath (usually with long hair-scales beneath), terminal joint moderate, not slender, 
somewhat rough-scaled, partly concealed, slightly longer in Q than in cf. Tongue present. Antenna 
moderate. in of bipectinate with moderate branches, apex nearly simple, in Q serrate-dentate (shortly 
bipectinate in P/enix). Pectus strongly hairy. Femora hairy. Foretibia tufted. Hindtibia in cf not dilated, 
in both sexes rather rough-scaled, with four rather long, rather approximated spurs. Abdomen not 
crested. F'renulum in gf slender, from before basal expansion, in Q wanting. Forewing with costa 
slightly arched, apex acute, termen oblique, more strongly so posteriorly, faintly sinuate in anterior 
half, cell less than one-half, DC strongly incurved, SC! from cell, free, or anastomosing or connected at 
a point with C, SC? normal, R! just separate, M! separate; hindwing with apex and termen moderately 
rounded, tornus pronounced, cell short, DC? rather incurved, oblique posteriorly, C approximated to 
cell for a short distance, rather rapidly diverging, SC? stalked. M!approximated, occasionally almost 
connate. 
Early stages unknown. 
A small and compact genus, different in facies from PArudocentra, and structurally in the more 
hairy legs and palpus, shorter and rougher third joint of the latter, etc.; in these characters recalling 
Comibaena. Hulst confuses it with A4maflodes (— Nemoria, part.), from which it is distinguished by the 
absence of Q frenulum, and by differences of leg-structure, etc. 
Type of the genus : Dichorda tridaria (Guenée) — Geometra iridaria, Guenée (1900). 
Geographical distribution of species. — United States to Amazons, 
1. D. iridaria (Guenée). Eastern U. S. A. to Guate- 
Geometra iridaria, Guenée, Spec. Gén. Lép. Vol. 9, p. 344 (1858); Druce, mala. 
Biol. Centr. Amer. Lep. Het. Vol. 2, t. 49, f. 5 (1892). 
Geometra remotaria, Nalker, List Lep. Ins. Brit. Mus. Vol. 22, p. 530 (1861). 
Geometra iridaria var. consequaria, H. Edwards, Papilio, Vol. 4, p. 19 (1884). 
Holothalassis iridaria, Gumppenberg, Nova Acta Acad. Leop. d. Naturf 
Halle, Vol. 64, p. 510 (1895). 
Anaplodes remotaría, Hulst, Trans. Amer. Ent Soc. Vol. 23, p. 316 (1896). 
? Anaflodes iridaria, Hulst, ibidem, p. 316 (1896). 
Slossonia latipennis, Hulst, The Canad. Entom. Vol. 30, p. 217 (1898) 
(teste Grossbeck, Ent. News, Vol. 20, p. 354). 
Dichorda iridaria, Warren, Novit. Zool. Vol. 7, p. 132 (1900). 
Dichorda perpendiculata, Narren, ibidem, Vol. 11, p. 503 (1904) (var. ?). 
2. D. rectaria (Grote). "Texas, Colorado. 
Geometra iridaria (part.), Packard, Mon. Geom. U. S. A. p. 
(nec Guenée). 
Geometra rectaría, Grote, The Canad. Entom. Vol. 9, p. 157 (1877). 
? Anajlodes iridaria, Hulst, Trans. Amer. Ent. Soc. Vol. 23, p. 316 (1896 
(nec Guenée). 
394 (1876) 
3. D. iris (Butler). Amazons, Guatemala, West 
Nemoria iris, Butler, Trans. Ent, Soc. Lond. p. 328 (1881); Druce, Biol. Indies. 
Centr. Amer. Lep. Het. Vol. 2, t. 49, f. 10 (1892). 
