Which of the following is NOT a species of lice?

The reason the eyebrow louse is the correct choice for being not a species of lice is that there is no known louse specifically referred to as the "eyebrow" louse in established entomological or medical references. Lice are classified into different types based on their location and the body part they infest. The recognized species include the head louse, which infests the scalp; the body louse, which is found on the body and clothing; and the crab louse, which infests the pubic area and is named for its crab-like appearance. Each of these types is well-documented, while an eyebrow louse does not exist in any significant scientific literature. This distinction highlights the importance of understanding specific terminology in entomology.