2l6 ENTOMOLOGICAL NEWS. [June, 



gonate, costa and outer margin slightly convex; 2 internal veins; 

 median three branched; cell broad, closed by a slightly concave 

 vein; 5 arises below the middle of cross-vein; 6 is a continuation 

 of the subcostal; 7 arises from subcostal before end of cell, 8 

 wanting. 



This genus seems hardly to belong to the Arctiidse. In the 

 position of the median venules of the hind wings it is like the 

 Agaristidae, but vein 8 is entirely absent. 



Z. trigona Grt. This differs from its ally, Z. specularis H. S., as follows: 

 Head, collar and patagia in specnlaris uniformly yellowish gray; in trigona. 

 mouse-gray, with a central line and rims of collar, as well as the edges 

 of patagia, of rose color. Primaries above: the hyaline space in specu- 

 laris runs from costa in three small undulations to within outer margin, 

 then loops inwardly, skirting the discal area in two large bows back to 

 costa. In trigona it is a simple curved line, keeping at a distance from 

 the outer margin, resting with a sharp inner hook on median vein and 

 then traveling back to costa in a curve. In specularis it is strictly hyaline; 

 in trigona the space is powdered with straw-yellow, bcth having the black 

 granules; the space of costa covered by hyaline blotch is 8-9 mm. in 

 specularis; 5-6 mm. in trigona. The apical area in specularis is yellow- 

 ish gray, the costa being yellow, while in trigona it is blackish gray, with 

 a red apical costa. In specularis the intersection of nerves at outer mar- 

 gin is light gray, in trigona it is black; besides there is a narrow, but 

 bright yellow marginal band in trigona. A rose colored, small basal dash 

 and a small reddish line at angle of trigona. In specularis there are two- 

 small yellowish basal dots, one resting on median and the other on sub- 

 median vein. In trigona there are two large basal dots, very often con- 

 fluent, thus forming an irregularly square, basal yellow field; besides, 

 there is always in trigona an irregular, yellowish blotch, covering the me- 

 dian space between this basal field and the hyaline costal area, most in- 

 tense in color near base and fading towards angle. Secondaries in specu- 

 laris strictly hyaline, with a brownish marginal rim and a light shade of 

 rose along anal margin. In trigona more opaque, whitish hyaline, no- 

 marginal rim, but an intensely rose-colored area along anal margin; ante- 

 rior margin of specularis slightly curved at centre and somewhat pointed 

 at angle, while in trigona it is well rounded. Primaries below in specu- 

 laris, as well as the nerves, whitish gray, with a rose-colored dash along 

 costa from inner rim of hyaline space pointing towards base. In trigona 

 the most intense rose color, with the exception of apical space, which is 

 dark gray, crossed by rose-colored veins and a marginal white tint along 

 inner margin. Expanse of wings: specularis 38-40 mm. ; trigona 33-35 mm. 



The specimens before us are from Mexico, Chiriqui Hay and 

 Venezuela in specularis; and from Colorado and the Southwest 

 in trigona. 



