Unfortunately I have been unable to ascertain the exact age of the louse itself, so whether it scrapes in or not is a moot point, but you're the specialist, r, and I defer to your expert knowledge.
Here is an illustration of the Three Ages of the Louse
from which we have ascertained that the one illustrated previously is a mature specimen, approaching indeed what passes in lousedom for the prime of life. A lady asks what the plural might be, to which we are pleased to be able to supply the answer
lice. Lice are well-known for their admirable adherence to
absolute criteria with regard to their preferred abode. Of the two principal species, one is found only in the region of the human head while the other, often confused with certain unrelated crustaceans, has distinctly more racy proclivities.