128 [Assembly, 



Glyphina ulmicola. Thomas : 8th Heport Ins. 111., 1879, pp. 



142-144, 11^8. 21, 22, p. 204. 

 Colopha comjpressa Koch. (Estlund : G.-N. H. Surv. Minn., 



1886, p. 55. 



An Unrecognized Insect Attack. 



A peculiar insect injury to the leaf-stalk of Norway maples was 

 sent to me by Mr. George T. Lyman, of Bellport, N. Y. It con- 

 sists of an elongated (slit-like) puncture, which had healed over, on 

 the upper side of the stem, at a point distant from the base of the 

 leaf-stalk about three-fourths of an inch. Directly opposite the 

 puncture the stalk breaks and the leaf bends over at an obtuse 

 angle, splitting the stalk by the flexure at several points on its 

 diameter for the space of perhaps a half-inch or less. The injury 

 causes the leaves to separate from the twigs at their point of attach- 

 ment and fall to the ground. 



A careful microscopic examination of several of the broken stalks 

 failed to show the presence of any egg or remains of an ^^^^ larva 

 or larval burrowing within the stem. It would rather appear as 

 if the puncture had been made by some hanstellate insect for the 

 purpose of feeding on the sap. But, if so, why then the remark- 

 able uniformity shown in the location of the wound — the range of 

 variation not exceeding a fourth of an inch in a stalk-length of 

 about four inches. 



The attack was not recognized, nor had it been observed, by some 

 of my entomological friends to whom examples were submitted. 



Specimens have been placed in the State collection. 



A Grass-infesting Mite. 

 Trombidixom f hicolor (Herm.). 

 Specimens of a mite were received from Mr. William Trimble^ 

 of Concordville, Pa., under date of April twenty-eighth, which 

 were very destructive to timothy fields in that neighborhood. The 

 infested places looked as if they had been scalded. June grass, 

 Poa pratensis, was untouched, as were also all the other grasses 

 except timothy. They were first noticed about a year ago, and 

 seemed to be increasing rapidly. 



