342 MR. A. G. BUTLEB ON THE 



which is a light-shaded canal, the transverse water- vascular canal, which 

 joins with the longitudinal water- vascular canal (6) at each lateral edge 

 of segment. 

 Fig. 21. Magn. 65 diam. Transverse section through a part of one of the lowest 

 zooids of the colony : a, skin ; b, layers of muscular fibre and inorganic 

 nodules ; c, fibrous boundary of visceral space ; d, ovarian vesicles in 

 visceral space ; e, lumen of longitudinal water-vascular canal. 



Notes on the Lepidoptera of the Family Zygaenidse, with Descrip- 

 tions of new Genera and Species. By Aethue G. Butleb 

 P.L.S., F.Z.S. 



[Read May 6, 1875.] 

 (Plates XXVII. & XXVIII.) 



In the present paper I propose to correct errors in the synonymy 

 of the Family, chiefly occurring in Mr, Walker's lists. I shall not, 

 however, pay much attention to the genera Zygcena, Procris, and 

 other European groups, as I have not deeply studied them, and 

 should possibly do more harm than good in sinking many of what 

 seem to me undistinguishable species, but which may (for any thing 

 that I know to the contrary) differ in their earlier stages. I have 

 lately been made aware of the painful fact that species which in 

 their perfect state are almost identical in every respect, are, in the 

 larval condition, so dissimilar as to leave no doijbt of their being 

 distinct. This fact is perhaps in no instance better exemplified 

 than in our Cheerocampa elpeno?' and its Japanese representative 

 C. Lewisii, mihi. 



I find that in the Zygsenidae the neuration of the wings has 

 been much neglected, so that in the groups Syntominse {Si/nto- 

 mides, part., Herrich-Schaffer), Euchromiinae, and Eunomiinse I 

 shall have to diagnose many new genera ; when I do so I shall 

 refer to them all the species described by Walker and appertain- 

 ing to them. As regards the Charideinae (Charideoidse, Wallen- 

 gren), as they are, to my mind, clearly a slightly aberrant group of 

 Arctiidse, and not Zygaenidse, excepting in exteimal appearance, I 

 shall retain them for a distinct paper. 



I have paid most careful attention to the neuration of the wings 

 in this highly interesting group, and I find the neuration of the 

 Charideinae to agree closely with Phragmatolia and other unques- 

 tioned genera of Arctiidse ; the only character that has been pro- 

 posed, to my knowledge, by which a.ny of them can be separated, 

 IS their metallic ooloration — a poor character when we take into 



