418 REPORT OF THE COMMISSIONER OF AGRICULTURE. 



variety from a stalk of Cacalia suaveolens. This year, from the steia of 

 some weed, of which 1 made no especial note, I obtained a small, almost 

 golden variety. 



Grapkolithaprunivora Walsh. — The larvae of this pretty Tortrix were 

 found iu a large proportion of the Early Richmond and Morello cher- 

 ries that dropped from. the trees early in May, when about the size of 

 large peas. In this case there was some defect in the instinct of the 

 parent moths, as the stung cherries invariably dropped before suffi- 

 ciently swollen to furnish the amount of nutriment required for the de- 

 velopment of the larvae, which accordingly perished when about half 

 grown. I also found these larvae, as in previous seasons, in the cocks- 

 comb elm-galls, feeding on the aphides and their sweet secretions. 



8elant]ri« mitt Halt. — This Tenthredinid made its appearance this 

 summer tor t he first time in the vineyards of Kirkwood and vicinity. It 

 was not destructively abundant, but may become so in the course of a 

 few years. Its gregarious habit, however, betrays its presence and 

 renders it comparatively easy to keep in check. The larvae succumb 

 quickly to the effects of pyrethrum powder as well as of hellebore. 



iStlandrla sp..on plum. This gelatinous slug occurred very abundantly 

 in May on all the cultivated plums, and did considerable injury to the 

 foliage. 1 did not find it <fn any Qther tree, nor would it feed on the 

 leaves of any other variety of Pntmis, even the most closely allied. The 

 second brood of the larva? was, from some cause, less than the first in 

 numbers, and the September brood, which hibernates, did scarcely any 

 damage. 



Early in the summer the foliage of the ash trees (JPmfflnw americana) 

 was much eaten by a Tenthredinid that I have not yet been able to rear, 

 although I have observed it for several successive years. The slug is 

 about the size of and very similar in appearance to Selandriavitis, being 

 pale green, with small, immaculate black head and a double transverse 

 row of short black spines on each segment. It inhabits the under sur- 

 faces of the Leaves, and in feeding perforates them with round holes, of 

 sizes corresponding with its stage of growth. It enters the ground 

 about the last of May and incloses itself in a frail earthen cell. It.seeins 

 to he but single-brooded, and in the rearing-cage either dries up or 

 molds, without changing to pupa, iu the course of the summer. 



