THE CANADIAN ENTOMOLOGIST. 97 



Beneath, fore wing fuscous centrally, yellowish along costal and outer 

 margin. Hind wing whitish centrally, yellowish along costal and outer 

 margin, with faint discal spot and mesial band. 



Type, Huachuca Mts., Ariz. 



Isogona acu7ia, n. sp.— Expanse 28 mm. 



Ground colour pale brownish yellow. Head and collar dark umber 

 brown. Thorax and abdomen concolorous with wings. Ordinary markings 

 rather faint lines running same as in other species of the genus. T. a. line 

 with inward tooth on cell, thence inwardly oblique to inner margin. 

 Median shade very faint. T. p. slightly wavy towards inner margin, 

 angled opposite cell as in other species. The projection from angle to 

 apex faint though traceable. S. t. line pale, irregular, barely traceable, 

 except towards costa. A few blackish scales on inner margin in subter- 

 minal space and a black point above them. The apical triangle only 

 slightly darkened. Reniform moderate in size, concolorous, with narrow 

 defining, slightly darker ring. Orbicular scarcely to be distinguished in 

 the specimens before me. Fringe slightly darker than wing, with dark 

 line at base, followed by a slightly paler one. Hind wing concolorous 

 with fore or a trifle paler. Well marked dark mesial band, followed by 

 more or less evident dusky shade. 



Beneath, fore wings uniform even pale brownish yellow, with no traces 

 whatever of any marking. 



Type, Babaquivera Mts., August, Redington, Ariz. 



Isogofia segiira, n. sp. — Expanse 28 mm. 



Wing form and general type of maculation same as natatrix. The 

 colour has, however, somewhat more of a reddish cast. The t. a. line, 

 instead of being even and rigid, is dentate, having three well-marked teeth. 

 Orbicular a well marked black point, smaller and blacker than in its ally. 

 Median shade and reniform about the same in the two species. The 

 triangular patch on costa, before apex, considerably darker brown than 

 rest of wing. T. p. line and spur running to apex, not quite so heavy. 

 The crenulate subterminal line and pale line at base of fringe about the 

 same, as is also the minute black point before inner angle. .The space 

 beyond t p. line somewhat darker' than rest of wing. The wing is also 

 darkened somewhat in the angle of t. p. line. Hind wing concolorous 

 with fore. Mesial band not quite so well marked as in natatrix. A 

 broad dark shade following mesial line. Palpi, head and collar dark 

 blackish brown. Thorax and abdomen concolorous with wing. Beneath, 



