27S Lloyd's natural history. 



,the costa and hind margin, and dark brown in the female, varied 

 with whitish-grey only in the middle of the wing. 



The larva is a very handsome one. It is lilac varied with 

 olive, and with a reddish tinge on the sides. On the back of 

 the twelfth segment is a black hump. There is a bright yellow 

 line above the legs, on which the spiracles stand out black in 

 v/hite rings. The head is brownish. 



It feeds on birch and sycamore. 



The cocoon and pupa are like those of P. fremu/a, but 

 smaller. 



PHEOSIA DICT/EA. 



Bomhyx dicfcva, Linnaeus, Syst. Nat. (ed. xii.) i. (2) p. 826, no. 

 60 (1767). 



I reject this name for P. tremula, Clerck, not only because 

 it is later in date, but because neither the description nor 

 locality agree with that species, and they will, I anticipate, be 

 found to apply to some species which has been lost sight of 

 since the time of Linnaeus. Herewith I append his description. 



P. Bomhyx elinguis, alis deflexis exustis plaga albida^ in- 

 ferioribus albis. 



Habitat in Barbaria, rarius in Europa. 



Media. Corpus testaceum uti Ante7i?icB. Alse superiores s^ipra 

 exusfcB ; plaga media lo?igitudinali albida et puncto liiieaque 

 ?iivea Juxta thoracem. Inferiores albce^ ad afigulum ant fiis- 

 cescentes. 



GENUS MELALOPHA. 

 Melalop/ia, Hiibner, Tentamen, p. i (18 10?). 

 Pygcera, Ochsenheimer, Schmett. Eur. iii. p. 224 (1810). 

 Ichthyiira, Hubner, Verz. bek. Schmett. p. 162 (1822?); 



Walker, List Lepid. Ins. Brit. Mus. v. p. 1054 (1855). 

 Closlera, Stephens, 111. Brit. Ent. Haust. ii. p. 12 (1828). 

 The species of this genus are of small size, with the antennae 



