6 PLATYPTILUS. 



Siskiyou Mountains, California, June 1872. 



- Distinguished from P. bertrami by its brown head 

 and frontal tuft, and by the darker cilia of the 

 apical margin, as well as by its more uniformly 

 brownish colour. 



Platyptilus grandis, sp. nov. 



(PLATE I. FIG. '5.) 



Capite, palpis etflocco front ali brevi dilute cervinis. 



Alls anticis costa, punctis duobus elongatis ante 

 medium et macula triangulari costali ante fissu- 

 ram brunneo-fuscis, regione apicali adumbrata, 

 lineola subapicali et ciliis palUdioribus, ciliis 

 in sinu marginis dorsalis et ad angulum analem 

 brunneo-fuscis ; posticis dilute brunneo-cervinis. 



Head, palpi, and frontal tuft pale fawn-colour, the 

 latter shorter than in the smaller allied species, 

 P. bertrami and P. adustus ; antennae fawn- 

 brown, faintly spotted on their upperside. 



Anterior wings pale fawn-colour ; the costa tinged 

 with brownish fuscous as far as the triangular 

 costal blotch before the fissure, which is of the 

 same colour; two brownish-fuscous elongated 

 dots are situated before the middle of the wing, 

 the lower one of these being nearest to the base. 

 Beyond the costal triangle, after a pale intervening 

 space, the lobes above and below the fissure are 

 shaded with fawn-brown to the apical margin. 



