NO.1140. NORTH AMERICAN NOCrniDAE—SMITIT AND DTAR. 149 



ordinary spots are traceable, and the transverse posterior line may be 

 made out as a somewhat paler, bisinuate shade. 



Edolata has the primaries narrower and more nearly equal. Tiie 

 transverse posterior line is easily traceable and is very strongly den- 

 tate. The strigate marking is fully developed here and besides the 

 black line in the submedian interspace there is another through and 

 extending outwardly beyond the (;ell. 



Extricata and xyliniformiH are ashen gray species in which the stri- 

 gate type is not so strongly developed as to obscure everything else, 

 and M'here the transverse maculation is at least more obvious. 



Extricata is somewhat larger, and darker bluish gray. The trans- 

 verse anterior line is not well marked in most specimens, sometimes 

 absent, and the transverse posterior line is strongly denticuhite. 

 There is a distinct tendency to an angulated, median shade line, which, 

 indeed, is sometimes distinct and complete. A long basal dash, a 

 streak crossing the transverse posterior line opposite anal angle, and 

 a black streak below the ordinary spots in the cell emphasize the 

 streaky appearance. 



XyliniformiH is a painfully variable species; not because it can be 

 confounded with anything else, but because, with a few specimens from 

 well-separated localities, it allows itself to be so prettily divided into 

 two series. It is ash gray in color, sometimes so densely black pow- 

 dered that all the markings are obscured and sometimes so sparsely 

 that it seems much lighter in ground color, and all the maculation is 

 evident. Large, dark, and i)Owdery specimens sometimes resemble 

 extricata, but always difl'er by the absence of a longitudinal black basal 

 line. The dash opposite the anal angle is almost always distinct, and 

 usually crosses the transverse posterior line, though it rarely forms a 

 well defined />.si The ordinary spots are usually distinct and always 

 traceable. 



Oblinita and lanceolaria agree in the very pale gray primaries, which 

 are narrow, long, and sublauceolate. The head is a little more sunken 

 than usual, and there is a distinct tendency to a short tongue, more 

 marked in lanceolaria than in its ally. 



Oblinita. is rather smaller in average expanse, much more powdery 

 and streaky in appearance, with the median lines so far as traceable 

 very strongly dentate. 



Lanceolaria is mu(;h more evenly col<»red, and has a very smooth 

 bluish tinge over the white ground. The transverse posterior line, 

 which is the onJy one obvious in my specimens, is very even, hardly con- 

 trasting, and accompanied by a paler shade inwardly. 



Insolitaia unknown to me, but is associated in wing form with oblinita 

 by Mr. (Irote. It is also given the more sunken head and other char- 

 acters of the series, differing by the black primaries. 



The general structure of the male clasper may be compared to a 

 thumb and forefinger held su as to lorm an acute angle, the finger or 



