Our street's boulevard trees are getting taken over by them again this year.
If your street is similar the thing to do would be to give Parks and Rec a shout. Called this morning and the chargehand was already out to have a look (I think you can also use the form at
http://www.brandon.ca/departments/operations/report-an-issue ). Based on what he saw our street is likely going to be sprayed with something that's totally harmless to people. Sounds like as the weather warms up over the next few days one could expect them to get worse!