What southwest US bug bites embeds in skin lays eggs triangle shape or black bug with wings?
black sandfly,the eggs hatch more flys get an insecticide dispenser, and can leave serpent shaped parasites that have triangular heads that show and carry fly eggs in stage 3 or 4 the females bite after mating and leave the grub that takes at least 2 weeks to show more then just a red mark,it can develope into a leason or be sub cutaneous and is just awful hard to see when it is sub cutaneous it just devlopes like leprosy and the parasites are blood feeding.