tlie Lepidoptera referred to the yenus Acronycta. 315 



lated, always longer than the lower, the latter obliqne ; 

 remaining veins normal. 



From this type of neuration the genus Ecpantlieria 

 (Arctiidce)* differs in the emission of the second subcostal 

 branch of the primaries at some distance beyond the end 

 of the cell, and, as a natural consequence, in the absence of 

 the little cross-vein uniting it to the third branch ; in the 

 secondaries, moreover, the radial is emitted close to the 

 third branch of the median vein. As these differences 

 are not so great as those existing between many genera 

 associated under the same fiimily, and as Diphtera orion 

 and its allies is intermediate in structure, 1 see no reason 

 why Hiibner's genus Pharetra should not be reinstated 

 for the reception of ^. rumicis, auricoma and allies, and 

 placed in the ArctiidcB. 



In the LiparidcB, the genus Lcucomn, though so broad 

 in the wing that nobody would naturally suspect it of 

 affinity to Acronycta, differs in its neuration in only two 

 important points, that is to say, in the position of the 

 cross-veinlet vmiting the second and third subcostal 

 branches of the primaries and in the slight displacement 

 of the second median branch, which is emitted farther 

 from the end of the cell ; the difference in the structui'e of 

 the antenna} not being of more than generic importance, 

 I would propose the removal of A. leporina, the type of 

 Acronicta (sic) Ochs., to the Liparidce. 



A. aceris differs fr^om A. leporina not only in the 

 greater size of its secondaries and thicker shorter palpi 

 (the palpi of A. leporina being markedly slender and long 

 as compared with the other species), but its larva is ex- 

 tremely like that of Dasychira: a comparison of the wing- 

 structure of ^. aceris with that of Dasychira shows only 

 one difference, that is, in the slight displacement of the 

 radial of secondaries, which is emitted much nearer to the 

 origin of the thii'd median branch. I would, therefore, 

 place A. aceris, as type of Hiibner's genus Artomyscis, 

 near to Dasycliira. 



A. meyacephala, both in its larval character and colora- 

 tion, much resembles some of the genera allied to Pyyccra; 

 if we compare it with Pyycera and ISymmerista we find tliat 

 it differs from the former in the displacement of the lower 

 radial of primaries, and from the latter in the displacement 



* Possessing the same thickened but simple antenna as in Acronycta. 

 TRANS. ENT, SOC. 1879. — PAUT IV. (dEC.) Z 



