Palpi shod, ohliise, not iinijcciiiii!: Hir lif'y I tlic lioiil : second join! w idc tiiiii- 



caicd at 1 lie cud. flic scales partially concealing t he siiiall, short, (lc|ircsscd I liii-d 

 joint; a short frontal tnit hetwcen the palpi. I-'orc uings distinctlv lidcatc; 

 the costa straiirlitcr than in Thdninonnunt : tin; apex nuirc or less falcate, with 

 nsnallv a well-nKirked excavation lielow the ajjcx. llind wings cither dis- 

 tincth bent on the tirst median vennle. or with a salient angle. The costal 

 region is very narrow, ninch more so than in 'riKiniiiouoina^ and the sulicostal 

 venules are usually slKU'ter, otherwise the venation is of the same pattern as 

 in Tliumnonoma. in N. occl/indfn and caUfornidfa, the aret)lo is open exter- 

 nally. The hind wings are well rounded at the apex, very angular on the 

 tirst median vennle, or the angle (as in (iccUinala) is obtuse aiul much less 

 distinct; scalloped, usually distinctly, on I he outer edge ; the inuer angle is 

 well marked and jiarallel with the end of the abdomen, which lattcn- is long 

 and slender, though nuicdi less so than in Thamnonoma. Hind tibiir. .scarcely 

 swollen, not much longer than the tarsi, or, as in S. oreKiimta, they are large 

 and much swollen, ami twice as long as the tarsi, '{'he species usually with 

 three lines on the fore wings, and a l()urth oblong, large, conspicuous spot, 

 with a dark liiu' on the curve under the apex. 



This well-marked and wide-spread genus is usually recognized by the 

 falcate fore wing.s, the distinct excavation below the apex, and the angular hind 

 wings. From Thamnonoma it is (li.stingnished by the shorter pal'])i and nar 

 rower costal region and simple antenuce. The lower series of species merge 

 into Phasiane, the head becoming larger, the l)ody much stouter, and the wings 

 less falcate and angular, as in S. oceJUnata^ californiata^ and s-f.ignafa. 



The genus may, for convenience, be divided into three sections: A, those 

 with the fore wings scarcely falcate, and the hind wings but slightly angular; 

 B, those with slightly tidcate wings and ani,nilar hind w iugs : ami ( ", those with 

 decidedly falcate wings and the angle in the hind wings very ])rominent. The 

 species are ochreous or granite-gray, usually with a costo-apical conspicuous 

 brown spot. 



Larva. — Caterpillar quite short, without lubcrcles, not alteniiati-d, marked 

 with longitudinal lines, living exposed on trees and bushes. Chrysalids in 

 cocoons at the surface of the earth (Gu(mee). 



The genus Se??iiothha was so well limited by Hiibner in 1818 (only one 

 of the seven species enumerated by him l>elonging to another genus) that I 

 see no good reason why it should not Ix; retained instead of Macaria. 



