250 



T. waoana and subcessarhi the only ditlerence of imi)ortance i>s the well- 

 ])r(;tinated antennse, and witli tliis exception, if we regard the imagines alone, 

 1lic two ironcra run into eacli other. 



I regard the inon^ typical species as T. tnjmnctaria and marcescaria ; the 

 former being the most unlike the others, having the palpi longer and the fore 

 wings more falcate than in any other species. The genus may be divided 

 into two sections : 



A. With very long, porrect paljii, hr()a(lly-|)ectinat<'d antennae, falcate, 



|)oint('(l fore vv'ings, angular hind wings, and a long, slender male 

 abdomen. 



B. Palpi lilunt and short; antenna' with iiectinations half as long as in 



section A, and with the fore wings scarcely falcate ; the hind wings 



not angular, pointed, and the al)domen shorter and thicker, much as 



in Semiothisa. Tiiis is represented l)y T. iravaria, subcessaria, 



hruni/eari((, and (irgil/accuriii. 



In T. hrun/zcarid, urgil/aceaiia, and sn/phunirin, the suljcostal areole is 



shorter and much wider tiian in T. vararia; the outer end ol" the cell being 



partially open in hn/i/iiearld, but closed, as usual, in argUlacearia and ml- 



phuraria. 



Si//i(i/)sis of the Species. 



A. Male antennie broadly [)ectinated ; palpi very long ; fore wings falcate: 



Tlii'L'C couspicnoMK lnowii patrbes on tbe luie \vius;s T. iripnnctarUi 



Miilo iiDtenu.-R loss broadly pectinated ; wiugs pale asb T. marcescaria. 



B. Fore wings subfalcate; male antenniP slightly pectinated; palpi short: 



A broad submarginal yellowisb Hue T. (jueiteariii. 



Like icavarxa, but witb more broadly-pectinated male antennte, witb four well- 

 marked lines; the outer second line on tbe fore wings less bent tban in xmvaria.T. i-Unehia. 



A mertio-costal, conspicuous, dark spot extending to tbe discal space, and two otb»r 



costal spots; wings dull wbitisb-asb T. wavaria. 



Like n-avurl<(, but wbitisb-asb T. suicessaria. 



Ocbreous-ycUow, witb large brown spots T. sulphuraria. 



Yellow; wings more falcate tban in siilphiirarUi, with four parallel lines T. Jiavicaria. 



Uniformly liglit. nnldisb-lirown T. brioiriearia. ' ■ 



Unifonnly argillaceous T. argiUacearia. 



Thamnonoma TRiPUNCTARiA Packard. Plate 9, tig. (18. 



Halia tripuncturia Pack., I'roc. Bost. >Soc. Nat. Hist., xvi, •i(i, 1S74. 



2 c? and 2 9. — Antemue with nuich longer pectinations than usual, being 

 much longer than in T. marcesaiiia. Palpi as usual. Fore wings with the 

 apex more produced than in 7'. ludrccsearia. lieiiig acutely falcate. Abdomen 

 without th(! two rows of l)lack dots present in marcescaria. Fore wings 



