Starting with your organic forms with contour lines, these are largely well done. You are for the most part sticking to the characteristics of simple sausages, and your contour lines wrap nicely around the forms. Just watch out for the few cases where your ends are of different sizes.

Moving onto your insect constructions, it's fair to say that you've improved a fair bit over the set. The first handful of drawings were admittedly quite simplistic, although it occurs to me that this may have been due to a misunderstanding. In the homework assignment, I asked for 4 pages of drawings that were purely constructional - it seems to me you may have interpreted this as to mean that you should be focusing on very simple construction, and that is not the case. Construction is all about building up complexity in successive phases, starting with simple structures and then adding more forms on top of them to introduce more specific information while maintaining the same level of solidity.

When approaching construction, the particular goal is to give the viewer the information they require to understand how they might manipulate this object in their hands. Conversely, when approaching texture, the goal is to give the viewer the information they'd require to understand how it might feel to run their fingers over the object's various surfaces. So, a much better example of a "basic construction" would be your wasp drawing.

Similarly, it's not uncommon for students to do this especially with the legs. As you can see here, they'll often just go as far as the top, just a basic chain of sausages. But really that's not nearly all the information conveyed to us in our reference image, so by stopping at that stage, we're not really doing our jobs.

To that point, you certainly did build more complexity into your insects' legs towards the end, and I feel that the black widow and the house fly are coming along quite nicely. I did however notice that when you add more bulk to your legs, you tend to 'envelope' your sausages with larger forms. A more effective approach than this (which you'll see in my little demo above) is to wrap an additional form right around the structure. It doesn't get as much done all at once, but what's important is that it builds a more direct relationship with the underlying form. When we swallow a form up inside another, it ends up having a much looser relationship with it. It can certainly work (and I actually do that in my wasp demo), but the approach demonstrated here is generally a better choice. You can also see it demonstrated here and even in this dog's leg, as it continues to be relevant throughout the next lesson.

The last little thing I wanted to point out is that on your dragonfly's legs, you added little lines coming off the surfaces - I assume to capture very tiny little protrusions. In general, it's best not to draw lines as though they represent freestanding forms. Instead, always try and strive for actually introducing actual forms into your construction, as shown on this crab claw demo. Obviously there they're much chunkier, but you can still do something close to the same even with the dragonfly's legs. You can see a bit of it in the ant leg demo I posted earlier.

Aside from that, your work is coming along well, and your drawings convey a well developing grasp of how to build up your objects from simple forms. I'll go ahead and mark this lesson as complete.