76 PTIL0PH0RA PLUMIGERA. 



pale full green. The tubercular warts are now hardly 

 to be observed on the level smoothness of the back. 

 Though the colouring is nearly all opaque and 

 approaching more or less to whiteness, yet the surface 

 of the skin is by no means rough, but has a certain 

 faint polish, allied^ to smoothness, like that of a new 

 white kid glove. 



When about to pupate the larva loses all its beautiful 

 opaque colouring and then becomes of a uniform green 

 and semi-transparent, otherwise like the underside of 

 a maple leaf in tint. 



The pupa is enclosed in a thin brittle earthern 

 cocoon, of a broad, oblong oval shape, and formed in 

 an upright position, with little silk in its texture, 

 though the interior is very smooth. The pupa itself 

 is of a more slender form, with the abdomen somewhat 

 more tapering than that of most Notodontidce, though 

 both extremities are rounded, the tail being furnished 

 with a pair of very small, fine curved spikes, with 

 which it is attached to the summit of the cocoon. 

 The pupa skin is delicately thin, polished, and of a 

 purplish-brown colour whilst containing the future 

 moth. 



It should be mentioned that the larvse will feed on 

 sycamore as well as on maple, and also that when young 

 and even half -grown they seem to be social, as two are 

 often found reposing on the underside of a maple leaf, 

 folded round side by side like a schoolboy's pot-hooks. 



The perfect insect appears in October and November. 

 (W. B., 13, 12, 70 ; B.M.M. VII, 210.) 



MlCRODONTA BICOLORA. 



Plate XXXIV, fig. 5. 



On the 24th June, 1882, I received sixteen eggs of 

 this species from Herr Ernst Heyne, of 18, Hospital- 

 Strasse, Leipzig. These eggs adhered to a piece of 



