I found this online..."Despite their common names, crane flies do not prey on mosquitoes as adults, nor do they bite humans. Some larval crane flies may on occasion feed on mosquito larvae. [1] Adult crane flies feed on nectar or they do not feed at all; once they become adults, most crane fly species live only to mate and die. Their larvae, called "leatherjackets", "leatherbacks", "leatherback bugs" or "leatherjacket slugs", because of the way they move, consume roots (such as those of turf grass) and other vegetation, in some cases causing damage to plants. Therefore the crane fly is occasionally considered a mild turf pest in some areas. In 1935, Lord's cricket ground in London was among the venues affected by leatherjackets: several thousand were collected by ground staff and burned, because they caused bald patches on the wicket and the pitch took unaccustomed spin for much of the season.[2]"

have you considered talking with a local lawn company .... your last sentence.. you talk about a detractant ... but wouldnt a fruit smell.. ATTRACT them ... if they are bugging you this bad.. i would suggest you go nuclear ... thru a lawn spray co .. and be done with them.. rather than messing around hoping you can deal with an unknown bug ... and that is the key why you should not flail around... get an ID of the problem ... and act accordingly.. and frankly.. it cant be done on words alone.. and i have never figured out how to take pix of such .... unless you were to get a sticky card.. get some stuck on it.. and then take pix .... ken

Yes. Other names are flower fly and syrphid fly.

Maybe blue orchard bee - Osmia lignaria, or a Carpenter Bee, abdomen are usually black but can be metalic blue.