THE CANADIAN ENTOMOLOGIST. 223 



short wavy beak or filament beneath at thick end, which is used for 

 attaching the egg to the leaf. 



Young Larva. — Length about .02 inch. Flattened, elliptical, pale 

 yellowish, pulverulent ; head broad, strongly arcuate in front ; antennse 

 short, conical ; eyes reddish, large and prominent, situated well back close 

 to thoracic margin ; thorax laterally twice dilated back of middle ; legs 

 pale ; margins fringed with rather long hairs. 



Pupa. — Length .10 to .12 inch. Broadly flattened ; yellow, greenish 

 beneath ; head not so strongly arcuate as in young larva and slightly 

 notched in front ; antennse much longer, apparently 7-jointed, dusky at 

 base ; wing-cases very broad and projecting slightly in front of eye and 

 considerably laterally ;* eyes brownish ; abdomen well rounded posteri- 

 orly, 8-jointed ; legs stout, pale ; strongly fringed with long hairs on all 

 sides. 



Imago. — ^ and ^ .10 to .12 inch ; length of wings. 15 inch. Black, 

 shining and slightly pubescent, in certain lights slightly tinged with bronze. 

 Head transverse with a deep frontal notch ; eyes prominent, three ocelli 

 black; antennge filiform, lo-jointed, two basal joints short and stout, 

 dusky, following joints slender, pale yellowish, slightly pubescent, ter- 

 minal joint thickened, black and tipped vvith two short bristles ; abdomen 

 elongate, somewhat conical, black and shming ; metasternum yellowish, 

 epimeral spines long, pale yellowish ; wings hyaline, apex of front pair 

 lanceolate, veins yellowish ; legs honey yellow, tibiae shaded with brown, 

 femora dark brown. 



The male is easily distinguished by its smaller size and by the usual 

 abdominal differences ; otherwise it does not differ from the female. 



The sketch on next page, fig. 12, will give one a fair representation 

 of its various stages : a, egg ; If, young larva ; c, mature larva or pupa ; 

 d, imago. 



THE BAY MAGNOLIA PSYLLA. 



This handsome and well known tree, Alagnolia glauca, is quite com- 

 mon along our creeks and swamps, and is noted far and wide for its 

 beautiful fragrant flowers. It is often, however, greatly disfigured by the 

 sting of a Psylla, producing a large gall on the leaves, a fact I ascertained 

 by breeding. This species is evidently a true gall-maker. The ■galls are 

 quite conspicuous on the leaves, of a large size, greenish yellow in color 

 with a bluish plume, and when fully matured open along the side in the 

 form of a large curved lip. 



