TKICHOPTILUS. 65 



which extends through the otherwise pale fawn- 

 coloured cilia on both sides ; along the base of 

 these intermediate fawn-coloured cilia are some 

 scattered fuscous-brown scales, two darker tooth- 

 like projections almost fuscous appearing on the 

 dorsal margin of the second lobe. 



Hind wings pale greyish brown ; the cilia cinereous, 

 interrupted with white behind and at the points 

 of the lobes. The third segment has long cine- 

 reous cilia, interrupted with white at the apex ; 

 slightly beyond the middle of its dorsal margin 

 is a very small square projecting tooth of fuscous 

 scales, preceded by a scarcely conspicuous white 

 dash in the cilia. 



The legs are white, dotted and barred above with 

 fawn-brown; the spurs white, the joints above 

 them being thickly clothed with fawn-brown 

 scales, from amongst which project some few 

 almost erect white ones. 



Abdomen whitish, faintly touched with pale fawn- 

 colour at the sides and above posteriorly. 



Expanse scarcely 10 millims. 



This is probably the smallest known species of the 

 Pterophoridse. I took three specimens near Millville, 

 in Shasta County, California, on the llth of July, 

 1871. 



