THE CANADLVN ENTOMOLOGIST. 31 



the evening. Have not found them anywhere except in or upon flowers 

 of this plant. Also observed a Humble-bee succeed in entering two or 

 three of the flowers, and, clasping the stamens firmly with its legs, it 

 reached the base of them with its tongue and usually went two or three 

 times around. It had much difficulty in getting into the flowers. No 

 other insects were observed about them. Could this bee fertilize Yttcca 

 flowers ? 



June 25, 1884. Found a young pear tree almost entirely defohated 

 by larvje of Vafiessa antiopa. I have never heard of the pear as a food 

 plant of this insect. 



Aug. ::4. I noticed an ichneumon fly (Ophiou) attempting to deposit 

 eggs in or upon a larva of Notodoiita coiicinna. After finding the position 

 of the caterpillar, the Ophion brought its head pretty close to it, and then 

 brought its abdomen and ovipositor up under its thorax and between its 

 legs, apparently using its mandibles as a sort of guide or brace for the 

 ovipositor. The Ophion was seen to probe the thoracic legs of the cater- 

 pillar with its piercer, but for what purpose I could not make out The 

 caterpillar was very much excited. For want of time I was obliged to 

 give up further observation, and killed the specimens. 



Aug. 25, 1884. The Buffalo Tree-hopper (Ceresa biibalus Fab.) is 

 very abundant on the branches and trunks of young apple and pear trees, 

 depositing eggs beneath the bark. They are sometimes so numerous as to 

 literally cover the limbs of the trees, and the cutting up of the bark must 

 do considerable injury. 



Sept. 22, 1884. Found a larva oi S. drupiferarum which was infested 

 with parasites, which could be plainly seen just below the skin. An hour 

 after it was taken, I looked at it again, and found nearly all the parasites 

 making holes in the skin, one of them already having its body half through 

 the hole just made. I put the larva in a paper bag and did not look at it 

 again for two days, when I found it still living, but weak, and with circular 

 marks on its back showing where the parasites had made their exit. In 

 the bag I found a bunch of small cocoons, set side by side, on end, like 

 the cells in honeycomb, all being firmly cemented together by a tough 

 brownish substance. 



