NEW BRITISH SPFXIES IN 1860. 85 



" The costa and inner margin are also more parallel in 

 -A^ coiicolor, and there is consequently less breadth of the 

 fore wino-s fi'ora the costa to the anal ande ; and the breadth 

 at the insertion seems also greater in proportion in N. con- 

 color than in N. Bonclii. 



*' The hind wings are much more oval in N. Bonclii, and 

 are devoid of a concave notch a little below the costa, which 

 is constant in N. concolor. The general appearance of 

 N. Bonclii is much more slender than that of N. concolor, 

 especially as regards the proportionate size of the thoi-ax. 



'' With respect to markings, there is a constant dotted line 

 more or less distinct at the insertion of the cilia in the fore 

 wings of N. concolor, totally wanting in N. Bonclii. On 

 the other hand, there is a constant shade in the centre of the 

 hind wings in N. Bonclii, which is absent in N. concolor ; 

 and while the under surface of the fore wings is dark sooty- 

 grey in K. Bondii, it is pale brownish-grey in N. concolor. 



" The antennae are much lono-er, the leijs are darker, larg-er 

 and much less hairy in JV. Bonclii than in N. concolor. 



" The palpi of J\^. concolor are larger, stouter and much 

 more thickly clothed with scales than in N. Bondii,ii\thou^\i 

 the latter is the larger insect," &c., &c. — See Zoologist, 

 p. 7270. 



Entomologists generally must feel much indebted to Dr. 

 Knaggs for the pains he has taken to point out the dis- 

 tinctions between these species. It may have been that 

 Dr. Knaggs was incited so to do by a high authority re- 

 puting his insect merely Concolor, but if so, we have here an 

 instance of what we frequently find, that the want of some 

 expected support induces people to lean on their ovv-n re- 

 sources, and the educational process of self-help thus set in 

 action renders them more useful members of society. 



