STILBIA ANOMALA. 119 



cles black, those on the second and twelfth segments 

 very large and distinct. Ventral surface, legs, and 

 prolegs uniformly dingy chestnut-brown. 



Yar. 2 has the ground-colour bright pea-green, with 

 just a tinge of yellow ; head of the same colour, but 

 thickly freckled with brown; two lines of a darker 

 green than the ground, enclosing between them a 

 white line, form the dorsal stripe; subdorsal stripes 

 white, finely edged with a darker green than the 

 ground-colour ; spiracular stripes white, edged above 

 with smoke-colour; spiracles black as in var. 1. 

 Ventral surface, legs, and prolegs uniformly of the 

 same colour as the ground of the dorsal area. 



Feeds on grass. (Geo. T. Porritt, December 2nd, 

 1879; E.M.M., February, 1880, XVI, 210.) 



Catooala fraxini. 

 Plate CIV, fig. 4. 



On the 2nd of July, 1886, I received two larvae of 

 Gatocala fraxini from Mr. R. 0. Ivy, of Southport. 

 One of them was nearly adult, the other about half- 

 grown. The former I described as follows : 



Length nearly three inches, but slender in propor- 

 tion. Head broader than the second, but a little 

 narrower than the third, segment, flattened in front 

 and slightly notched on the crown. Body of fairly 

 uniform width, but the seventh, eighth, ninth, and 

 tenth segments the widest ; it is round above, but flat 

 ventrally ; there is a small hump at the back of the 

 ninth segment, and a smaller ridge at the back of the 

 twelfth segment ; segmental divisions clearly defined ; 

 skin smooth and without hairs dorsally, but there is a 

 row of tolerably dense short hairs pointing down- 

 wards below the spiracles, dividing the dorsal from 

 the ventral area. 



The ground of the dorsal area is putty-colour, with 

 strong greenish tinge, and freckled, particularly at the 



