Waterboatman Pattern

Can anyone reccomend a link or pattern to tie up some Waterboatmen.

While removing my ice fishing shanty off the lake yesterday, I noticed
through some clear ice a Waterboatmen swimming about. I have heard that you
must be careful when you tie these not to tie something that might resemble
a Backswimmer, as these creatures sting, and trout avoid them. This will be
my first try using waterboatmen, as in the past I have gone with leach
patterns for spring ice out fishing.

Thanks in advance