Now when tackling legs - be it those of an insect or those of an animal, I see a lot of different strategies being employed (most of which I've tried myself over the years). I've found that the most reliable approach is to construct legs out of a series of sausage segments.
By sausages, I mean the kinds of organic forms we introduced in lesson 2, though not quite as fat. They're essentially two spheres connected by a tube that maintains a consistent width through its length. This means no arbitrary swelling or pinching, as this will undermine its solidity.
The great thing about sausages is that they can strike a balance between the need for our forms to maintain the illusion of solidity, while also being quite gestural and flowing in their nature. We can reinforce the illusion of form with a single contour curve right at their joints where they intersect, and leave the rest free and clear.