THE ENTOMOLOGIST. 309 



1871. Sytiie, Scottish Naturalist, i. 20. 



„ Wallengren, Ofv. Vetenskaps- Akad. Forhandl. 

 xxviii. 973, 1009. 



1872. J. J. Walker, Eut. Mo. Mag. viii. 185, 



„ F. Walker, Entom. vi. 107 (in a note on Ophion). 

 „ Newman, Zool. S.S. 3117, and Entom. vi. 153. 

 „ J. P. Barrett, Entom. vi. 199. 



„ Coibiu, Entom. vi. 233 (misprinted Airopus niveus). 

 „ Roelofs, Ann. Soc. Ent. Belg., Compte Rendu, 

 6 July. 



Ritsema has kindly sent me a print of his "Aanvulsel lot 

 het geschiedkundig overzigt van het geslacht Acentropus," 

 which will be published in 1873 in the ' Tidjschrif't voor 

 Entomologie,' vol. xvi. pp. 16 — 25. In a note on p. 25, he 

 tells us that he captured niale specimens of the moth at 

 Overween as early as the 12th May, and (as also recorded by 

 Roelofs) in the Island of Texel on the 29th May. In this 

 country Boyd found it at Cheshunt on the 1st June; and 

 Corbin at Ringwood, from the beginning of June to the end 

 of August. The latter writer mentions various enemies that 

 prey upon Acentropus. F. Walker and J. P. Barrett both 

 record instances of the moth being attracted to light. Syme's 

 capture of the insect in Scotland is interesting, as corrobo- 

 rating Leach; he mentions Potamogeton filiformis as the 

 species of pondweed which it frequented, whilst J. J. Walker 

 mentions P. pectinatus. Boyd found pupae at Cheshunt on 

 the American weed, Anacharis alsinastrum ; the moth and the 

 Anacharis were abundant, Potamogeton was very scarce in 

 that locality; but there is as yet no evidence that the larvae 

 fed on Anacharis. The prominent lateral spiracles are not 

 confined to the pupae of Acentropus, but occur likewise in 

 the pupae of some at least of the Hydrocampidae. As to the 

 presence of tibial spurs in the perfect insect, see Snellen's 

 observation quoted by Ritsema (Tidj. v. Ent. xvi. 19, n.), 

 confirming what is stated previously. Wallengren, in his 

 * Skandinaviens Pyralider,' published in the twenty-eighth 

 volume of the Stockholm ' Ofversigt,' places Acentropus in 

 and at the end of the family Botydae, distinguishing it (at 

 p. 973) from the other sixteen genera by the characters — 

 "legs without spurs; female wingless; ocelli and superior 

 palpi wanting;" or, as it is expressed at p. 1009, "legs short 



