NATURAL HISTORY SOCIETY OF GLASGOW. 207 



Betuleti, Kl. (crataegi, Zadd.). — After the last moult, the larva of 

 this species is bright greenish-yellow, with a darker green line 

 running down the back. On the vertex is a large brownish- 

 orange spot, the legs pale whitish-green, with brown claws ; the 

 spiracles are reddish. The skin is covered with minute tubercles, 

 and sparsely covered over with a white powder. 



When young it is green, but dusted over with a white powder ; 

 the head is black, obscured mth a white exudation ; the region of 

 the mouth is white. 



So far as is definitely^ known, heiuleti is confined to the haw- 

 thorn for its food. 



Taschenberg, in his Entomologie fiir Garten, describes the larvae 

 of BlennocamiJa biimnctata, and of Athalia rosae ; so to make my 

 remarks {antea, p. 110 and p. 130) on these insects complete, I 

 give here his observations : — 



The 22-footed larva of B. hipunctata is whitish, yellowish on the 

 head, except the mouth and eye spots, which are darker. It lives, 

 boring into the pith of the rose branches, during the second half 

 of May, June, and sometimes on to the first half of July. Towards 

 the middle of April, or the commencement of May, the fly appears, 

 and lays her eggs singly in the point of the young branch. The 

 larva soon bores into the pith, whereby the leaves become 

 withered. It eats about an inch and a half into the branch, and 

 when it reaches maturity, bores a round hole in the side of its 

 habitation and drops to the ground, where it pupates. 



Of the larva of A. rosae he says that it is dark green above, at 

 the sides and belly clearer, and the head is reddish-yellow. There 

 are two generations in the year, the first appearing at the end of 

 June and beginning of July, the second is found in September and 

 October. The fly lays her eggs in the mid-rib of the rose leaves, 

 and when the larvae emerge they proceed to devour the upper 

 epidermis, so that the Ipwer becomes as transparent as gauze. 

 They spin a cocoon in the earth. The larvae are stated by J. 

 Schefiier to feed also on Sedum album. 



lY. — Notes on a new method of fixing fronds of Carhoniferous Polyzoa 

 on a layer of Asphalt, to show the celUdiferous face. By Mr 

 John Young, F.G.S. 



Those who like myself have collected the Polyzoa of our Car- 

 boniferous limestone shales, may have often expressed regret that 



