AMPHIDASIS.—SYNOPSIA. 71 
1. Amphidasis arnobia. (Tab. XLVIIL. fig. 4, ¢.) 
Phalena Geometra arnobia, Cram. Pap. Exot. iv. p. 188, t. 388. fig. I (9) *. 
Amphidasys arnobiaria, Guen. Sp. gén. des Lép. ix. p. 211 (¢)’*. 
Amphidasys arnobia, Walk. Cat. xxi. p. 808°. 
Hab. Mexico, Jalapa (Hoge, F. D. Godman, M. Trujillo), Cordova (Riimeli), Cuesta 
de Misantla (M. Trujillo), Atoyac in Vera Cruz (Schumann), Coatepec, Paso de San 
Juan (coll. Schaus), Valladolid in Yucatan (Gawmer); GuatuMata, in the City 
(Rodriguez) ; Panama, Chiriqui (Trétsch, in mus. Staudinger).—VENEZUELA ; GuIANA?%, 
Surinam !; Brazin23; Uraauay, Monte Video??; Antittes, San Domingo ®. 
Central-American specimens are larger than those from Venezuela and Brazil. 
Though the species is very widely distributed in America, it varies but little. 
2. Amphidasis matharma, sp.n. (Tab. XLVIII. figg. 5, g; 6, 2.) 
Male. Primaries and secondaries dark reddish-brown, irrorated with black; the primaries from the base to the 
apex blotvhed with greyish-white along the costal portion, the other portion of the wing sparsely dotted 
with greyish-white, the fringe alternately black and brown; the secondaries crossed from the costal to 
the inner margin by two waved black lines—the first a little before, the second below, the middle,—and 
with a round black spot at the end of the cell, the outer portion of the wing from the inner margin near 
the anal angle somewhat thickly spotted with greyish-white, the fringe brownish-black ; the underside 
considerably paler than above, with all the lines and spots very indistinct and confused: head, collar, front 
of the thorax, and antennz dark brown, the rest of the thorax greyish-white, the abdomen and legs dark 
brown.— Female. Primaries and secondaries pale brown, irrorated with greyish-white and black scales, 
both wings crossed from the costal to the inner margin by a submarginal waved black line, this line 
being much more distinct on the secondaries than on the primaries; the underside much paler than 
above, with the lines very indistinct: head, thorax, abdomen, antenne, and legs brown. Expanse, 5 2;4,, 
@ 34 inches. 
Hab. Guaremata, Cerro Zunil 4000 feet (Champion); Panama, Bugaba 1000 feet 
(Champion). 
Allied to A. crebraria, Guen., from Rio Janeiro, of which it may possibly prove to 
be a variety; but it differs so greatly in colour from Guenée’s figure of that insect that 
I have thought it advisable to describe it as distinct. We figure a male from Bugaba, 
and a female from Cerro Zunil. 
SYNOPSIA. 
Synopsia, Hubner, Verz. bek. Schmett. p. 317 (1816); Guenée, Sp. gén. des Lép. ix. p. 225; 
Walker, Cat. xxi. p. 326. 
1. Synopsia mexicanaria. 
Biston mexicanaria, Walk. Cat. xxi. p. 805°. 
Synopsia hedemanni, Feld. & Rogenh. Reise der Novara, Lep. t. 125. figg. 14, 15 (¢ 2)?. 
Hab. Muxico (Glennie; coll. Staudinger), Puebla, Huajuapan (Hedemann 2), Jalapa 
(Hoge, Schaus). 
We have only received one specimen of this species. 4 
