THE CANADIAN ENTOMOLOGIST. 11 



at the west end of the meadow; a third species, nymphea, is found 

 on lily-pads; some species are quite a pest, appearing in immense 

 numbers and destroying a great deal of foliage. 



We will now walk west, along the north end of Holdsworth's 

 farm, to the road that runs south between Holdsworth's and a farm 

 of John Hume, the Port Hope seedsman. After crossing the 

 road, we come to a little brook; on the water smartweed that grows 

 in this stream I found three or four years ago quite a number of 

 medium-sized black and light-brown striped beetles that worked 

 a new trick on me in methods of escape and with considerable 

 success. I was used to beetles that took to flight suddenly and also 

 to beetles that dropped from their perch on leaf or plant into the 

 tangle of vegetation below, but, except for the small flea beetles of 

 grape-vine, alder, turnip, horseradish, and so on, I was not pre- 

 pared for jumpers. But this whole Tribe X consists of jumping 

 beetles, and their hind thighs are greatly thickened in consequence. 

 Their name, Halticini, is taken from the genus Haltica or Flea 

 Beetle; the name simply means "the jumper." This beetle of the 

 water smartweed is Disonycha pennsylvanica. A much larger 

 beetle of the same genus I have found often on willow bushes by 

 the railway near Carmel, 12 miles north of Port Hope, and also at 

 several points in the Algonquin Park; it is light yellow-brown, with 

 a black margin round each wing-cover and a black stripe down the 

 middle of the same; thighs and abdomen orange-coloured; it is 

 Disonycha caroliniana and a most active leaper. There is one 

 more genus of these leapers that I have found, said to be uncommon 

 in Ontario; it is a very pretty beetle of fair size, with a close super- 

 ficial resemblance (in size, shape and colour) to Chrysomela lunata ; 

 reddish brown all over, this colour, on the elytra, being broken into 

 irregular stripes by narrow wavy lines of yellow. 1 have found it 

 abundant on the north shore of the Upper Rideau, feeding always 

 on the Fragrant or Canada Sumach. Blatchley describes it as 

 "common on the sumach," but I have never found it on the poison 

 ivy or the stag horn's ''only the fragrant sumach, which is a small 

 shrub," about the size of a gooseberry bush, having leaves almost 

 identical with those of the poison ivy — i. e., divided into three leaf- 

 lets and slightly toothed on one or both margins; the bark and wood 

 are fragrant, but with a certain pungency, not altogether pleasant. 



