Shon, These are excellent. I could actually see something like this being used for scientific illustration (I have commissioned such illustrations before). One of my friends had to do similar sketches for a graduate entomology class and really enjoyed it, those were less holistic and more close ups of parts though. Keep it up.
Hisserdude, yours are actually pretty good too. They mostly just lack shading. And I totally get the point about not being able to get the legs to look natural. I can get it if I copy an image closely, but free hand, I think I just don't 100% understand the legs and joints. They are so alien its hard to make sense of it sometimes.