250 



/. inn-arm and suhr.esstir'ui the only difference of importance is the well- 

 pectinated antennae, and with this exception, if we regard the imagines alone, 

 t he two genera run into each other. 



1 regard tin- more typical species as T. tripunctaria and marcescaria; the 

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

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

 into two sections : 



A. With very long, porreet palpi, broadly-pectinated antennas, falcate, 

 pointed fore wings, angular hind wings, and a long, slender male 

 abdomen. 

 13. Palpi blunt and shorl ; antenna' with pectinations half as long as in 

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

 not angular, pointed, and the abdomen shorter and thicker, much as 

 in Semiothisa. This is represented by T. wavaria, subcessaria, 

 brunnearia, and argillacearia. 

 In T. brunnearia, argillacearia, and sulphuraria, the subcostal areole is 

 shorter and much wider than in T. wavaria; the outer end of the cell being 

 partially open in brunnearia, hut closed, as usual, in argillacearia and sul- 

 phuraria. 



Synopsis of the Species. 



A. Male antennae broadly pectinated ; palpi very long; fore wings falcate: 



Three conspicuous brown patches on the fore winsts T. tripunctaria 



Male antennae less broadly pectinated ; wings pale ash T. marcescaria. 



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



A broad submarginal yellowish line T. gueniaria. 



Like* wavaria, but with more broadly-pectinated male antennas, with four well- 

 marked lines ; the outer second line on the fore wings less bent than in wavaria. T. i-linearia. 



A mcdio-costal, conspicuous, dark spot extending to tin- discal space, and two other 



costal spots ; wings dull whitish-ash.. T. wavaria. 



Like wavaria, but whitish-ash T. subcessaria. 



Ochreous-yellow, with large brown spots T. sulphuraria. 



Yellow ; wings more falcate than in sulphuraria, with four parallel Hues T. flavicaria. 



Uniformly light reddish-brown T. brunnearia. 



Uniformly argillaceous T. argillacearia. 



Tiiamxonoma tripunctaria Packard. Plate 9, lig. <>8. 

 Halxa tripunctaria Pack., Proc. Bost.-Soc. Nat. Hist., xvi, 26, 1S74. 



2 <? and "_' 9. — Antennae with much longer pectinations than usual, being 

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

 apex more produced than in T. marcescaria, being acutely falcate. Abdomen 

 without the two rows of black dots present in marcescaria. Fore wings 



