I have postponed replying to Mr. Bacot's communication (Can Ent., XXXV., 44–47) until I could examine his preparations. He has kindly sent them to me, and they seem definitely to settle the two points that remain at issue. The Agliatau is in fluid, and shows a number fo secondary setæ as described by Mr. Bacto. These setæ are short and unusally weak, so that in my own specimen, which is dried, inflated they had become partly shrivelled, partly broken in transit. I do not think, after examining Mr. Bacot's specimen, that they can be regarded otherwise than as true setæ, and I am very willing to acknowledge myself corrected. This correction, if applied to my synoptic table of Saturnian genera (Tutt, Brit, Lep., III., 272), makes my division stronger and sharper than before, allying Aglia more strongly than ever with Attacus and Saturnia.