172 THE CANADIAN ENTOMOLOGIST 



Anchor your dumping cloth across stream in shallow water. Stir 

 up the stones, commencing several yards up and working down. 

 Take your cloth to the bank and pick ofif your catch as the Parnids 

 cling to the surface of the material. 



Where to hunt is a dillficult matter to suggest. In Winnipeg 

 a number of species, especially Dytiscus, come freely to light. 

 Rixers, excepting under stones in rapids and among weeds in 

 back waters, are usually unproductive. Slow moving, weedy 

 creeks or muddy weedy ponds are usually good ground, but one 

 occasionally most unexpectedly comes across species in numbers. 

 Several years ago I had hunted for hours in some water near 

 Selkirk with the poorest of success. Just about giving up in de- 

 spair, I waded across a shallow bay in which not a weed could be 

 seen. Making a stroke almost without thinking, I brought up 

 my net swarming with a species of Haliplus new to me, which 

 turned out to be the rather rare borealis. Since then borcalis has 

 turned up in several places near here, but always in ones or twos. 

 In general, try in shallow water rather than deep, and in warm 

 spots rather than in cool shades. 



We have several interesting species of HaliplidcB in Manitoba. 

 These include three of Mr. Roberts' new species: //. subguttattis, 

 H. strigatus and H. torttilosus. Two others are H. borealis and 

 H. cribrariits. 



Among our more interesting Dytiscidce is a species of Lacco- 

 philus, to which Mr. Roberts has given a manuscript name. It 

 is very near mexicanus Aube. Its haunt appears to be muddy 

 sloughs in early spring. Then there is Deronectes depressiis Fab. 

 = brevis, according to Mr. Roberts, which is not uncommon in Stur- 

 geon Creek near here. Hydroporus vittatits Lee. is a charming 

 little striped species which, so far as I know, is represented from 

 Manitoba by but one specimen taken in an eddy in Sturgeon Creek. 

 The stream was much swollen by rains, so probably poor little 

 vittatus had been swept down from some comfortable marsh. At 

 at any rate, it appeared to be alone, as patient dredging failed to 

 secure more. 



Our two common species of Ilybius, angitstior Gyli. and con- 

 fusiis Aube are both fairly common at electric light in June, as is 



