212 THE CANADIAN ENTOMOLOGIST. 



the scutellum, gradually becoming narrower and very fine at the collar. 

 Median groove continuous, fine and narrow anteriorly, broad at scutellum. 

 Anterior parallel lines fine, close to the median line and extending to the 

 middle of the thorax. Lateral groove rather long. Pleurae rugose, finer 

 rugose on the mesopleurae. Scutellum large, rugose, more so than 

 the thorax, with a very narrow carina along the middle. Fovese at base 

 distinct, shining, and widely separated. Abdomen globose, shining, and 

 densely but minutely punctate. Wing hyaline, veins brown. Radial area 

 open. Areolet very large. Cubitus not extending to the first cross-vein. 

 Length, 2.75-4 mm. 



Gall. — Singly or in clusters of two to about eight, on the trunks of 

 young trees or along the stems of very young shoots of red and black oaks 

 (QuercHS rubra and Qiiercus velutijia) late in April until early in May 

 (8th), when the leaves begin to develop. Monothalamous. Ovate or 

 bud-like, somewhat rough and longitudinally ribbed. Bluntly pointed at 

 the apex. Soft, fleshy and green when fresh, often tinged with red. 

 Hollow inside. When mature they drop to the ground, and when old 

 they turn brown and become thin-shelled, with a large chamber inside. 

 Length, 5-6 mm.; width, 3-3.25 mm. 



Habitat. — New Jersey (Fort Lee district) ; New York (Van Court- 

 landt Park). 



The perfect insect reaches maturity late in October, but does not 

 emerge from the gall until April in the year following. The species is 

 closely allied to Atidricus (Trisolenia) saltatus Ashm. and pimctatus 

 Ashm. 



The gall exudes a honey-like liquid, which is greedily partaken by 

 ants, and, like A. saltatus^ has the power of jumping, due to the contrac- 

 tion and sudden relaxation of the larva within. 



INBREEDING OF LEPIDOPTERA. 



At one of the meetings of the Montreal Branch last season, Miss 

 Hutchinson, Leominster, Eng., exhibited a brood of larvae of a 

 Geometrid moth, Eupithecia consignata feeding on English hawthorn. 

 These were descendants of a $ taken in 1874 and in all these years of 

 inbreeding no change has been noted, except that both larvae and imagoes 

 have lost their desire to escape if left uncovered. — A. F. Winn. 



Mailed June 2nd, 191 1. 



