124 THE CANADIAN ENTOMOLOGIST. 



a little observation. I have found a, species of grass worked in by another 

 species of an allied insect, but the manner of work is so different as to be 

 unmistakable. Isosoma elymi makes a cavity on the inside of Elymus 

 Canadensis that is more nearly like that made by /. tritici in the wheat, 

 but they differ somewhat. 



In the fields I have found specimens of E. Allynii emerged from the 

 pupa skin, but still inside the cavity of the stem ; others with the hole by 

 which they expected to emerge gnawed so that they could almost get out, 

 and they still there with the body partly protruding, and others when they 

 had gone, the clean cut hole indicating where they had obtained their 

 freedom. I have bred many specimens from the straws after they had 

 been collected, and the conditions were the same as those in the field, the 

 inside of the stems in all cases being examined before putting them into the 

 breeding jar. 



From these facts I do not see how I could avoid the conclusion that 

 Eupebnus Allyjiii was a parasite on the two species of Isosoma. I may 

 say that my breeding jar in the case of such small insects is a jelly dish, 

 where there is no chance for anything outside to get in. 



GALERUCA XANTHOMELAENA, Schrank. 



BY FREDERICK CLARKSON, NEW YORK CITY. 



I visited Flushing, L. I., July 8th, to examine the insect reported to 

 be infesting the noble old English elms which adorn the principal streets 

 of that village. Three weeks ago these trees were in luxuriant foliage ; 

 they have now the appearance as if they had been scorched by fire. I 

 discovered them to be attacked with a countless host of the larvae of this 

 beetle. The American elm and other indigenous trees have thus far 

 escaped, but it is not improbable, as this beetle is double brooded, that 

 the numerous larvae will from the force of circumstance attack them. The 

 eggs are laid in clusters along the veins of the leaves, on their under 

 sides. The larvae, as soon as hatched out, begin to devour the leaves, 

 which they render lace-like, and when full fed they do not undergo trans- 

 formation by fastening themselves to the surface of the leaves, as is the 

 habit with other species, and as I have seen recorded of this, but transform 

 within the crevices of the bark. At this time, July 8th, the trunks of the 

 trees are covered with the larvae seeking places to transform, and there is 



