gkometrid.t:. — biston. 157 



In my Catalogue I separated this and the preceding genus from 

 Biston under the single term Amphidasis, but I am now convinced 

 that the two indigenous species belong to different genera, as pro- 

 posed by Duponchel, whose names I have adopted, Amphidasis 

 being rather synonymous with Biston, From Phlgalia, Nyssia may 

 be known by its stouter and narrower wings, which are very small 

 in proportion to the body, while the latter is stouter than in Phl- 

 galia : the form of the larva is different, &c. 



Sp. ] . hispidaria. Alls cinere.o-fuscis, strig'i undatd ohscuriore, margine albo- 

 punctato, antennis j'errugineis. (Exp. alar. $ 1 unc. 3 lin.) 



Ge. hispidaria. Wien. Vtrz.—Kxa^. hispidaria. Steph. Catal. part ii. p. 117. 

 No. 6453.— Ph. Ursularia. Don. xiii. pi. 447. 



Head and thorax griseous : anterior wings ashy-brown, with a lighter band at 

 the hinder margin, and with three dusky strigiE on the disc, the two anterior 

 of which are curved, and the posterior flexuous : posterior pale fuscous, with 

 a faint dusky line behind the middle: cilia of all pale, with large rhomboid 

 fuscous spots : antenna pale ferruginous : abdomen rufescent. Female with 

 the head, thorax, and abdomen coloured as in the male, antennae dusky 

 with very fine brown hairs. 



Caterpillar brown, with quadrate deeper spots : it feeds in the elm :— the imago 

 is produced towards the end of March. 



Rare: specimens have been taken in Richmond-park, and at 

 Coombe and Birch woods. " Netley"— i^rj. F. W. Hope. 



Genus CLX XL— Biston *, Leach. 



Palpi very short, velvety, triarticulate : maxilla; very short. Antenna rather 

 long, straight, strongly bipectinated in the males (in the type to the apex), each 

 joint producing a ciliated branch decreasing in length towards the base and 

 the apex ; three terminal joints sometimes simple, as the entire are in the 



* This and the two preceding genera form the section Boinbycariae of Haworth, 

 a division of the same import as those which have been recently, but incorrectly, 

 termed genera when employed by Hubner f, and which, from parity of reason- 

 ing, should have been adopted, were the name tenable, for the present genus, 

 Hubner's sectional names being proposed long posterior to Haworth's. 



t Amongst other absurd attempts to force Hubner's names into circulation, my genus 

 Neenia, which forms a portion of his Lemures, has been lately changed to Lemuris! ! the 

 genitive case singular of Lemur, a quadruped, for it can have no other derivation, Lemure 

 having, as is well known, no singular number. 



