So there are some things that stand out to me that were addressed in the various demos I pointed you to in my last critique.

Firstly, when drawing your ant head, you started with a ball, and then redraw a more complex form around it (effectively redefining its silhouette and leaving the original form to float loosely inside of it). The correct approach here is to build onto the structure, ensuring that every new form's relationship with the existing structure is defined as shown in the ant head demo I provided before. Now, obviously that ant is a different species from yours, but the principles on display are what matter.

Looking at your lobster drawing, you did add some of the bigger spikes as their own enclosed forms (although you didn't establish a relationship between those forms and the existing structure as shown here which in turn still made them read as flat shapes). When it comes to the main claw itself, you still built up the serrations there as flat shapes. As discussed in my original critique (and also demonstrated in the lobster demo you should have been drawing those as complete, enclosed forms as well.

I think it might be a good idea for you to draw along with the lobster demo, step by step, to try and get a sense of how this kind of thing might be approached. It's one thing to just look at it, but actually following along can be more educational.

Along with following along with the lobster demo, I'm also going to assign two more insect constructions. You're definitely showing progress in some areas (defining the joints between sausages and such is definitely helping a lot), but you're not quite there yet.