Head louse

The head louse (Pediculus humanus capitis) is an obligate ectoparasite of humans that causes pediculosis capitis. Head lice are wingless insects spending their entire life on the human scalp and feeding exclusively on human blood.Humans are the only known hosts of this specific parasite, while chimpanzees host a closely related species, Pediculus schaeffi. Other species of lice infest most orders of mammals and all orders of birds, as well as other parts of the human body.

Lice differ from other hematophagic ectoparasites such as fleas in spending their entire life cycle on a host. Head lice cannot fly, and their short stumpy legs render them incapable of jumping, or even walking efficiently on flat surfaces.

The non-disease-carrying head louse differs from the related disease-carrying body louse (Pediculus humanus humanus) in preferring to attach eggs to scalp hair rather than to clothing. The two subspecies are morphologically almost identical but do not normally interbreed, although they will do so in laboratory conditions. From genetic studies, they are thought to have diverged as subspecies about 30,000–110,000 years ago, when many humans began to wear a significant amount of clothing. A much more distantly related species of hair-clinging louse, the pubic or crab louse (Pthirus pubis), also infests humans. It is visually different from the other two species and is much closer in appearance to the lice which infest other primates. Lice infestation of any part of the body is known as pediculosis.

List of Beavis and Butt-head episodes

The following is an episode list for the MTV animated television series Beavis and Butt-Head. The series has its roots in 1992 when Mike Judge created two animated shorts, "Frog Baseball" and "Peace, Love and Understanding", which were later aired on Liquid Television of the Mike Judge Collection DVDs (see related page for a detailed listing).

Series overview

Episodes

Shorts (1992)

Both shorts originally aired as part of Liquid Television and did not include music videos.

Season 1 (1993)

Mike Judge himself is highly critical of the animation and quality of these episodes, in particular the first two – "Blood Drive"/"Give Blood" and "Door to Door" – which he described as "awful, I don't know why anybody liked it... I was burying my head in the sand."

Season 2 (1993)

Season 3 (1993-94)

Season 4 (1994)

Season 5 (1994–95)

Season 6 (1995–96)

Season 7 (1997)

Starting this season, the show switched to a 7-minute short act, with most of the shorts running approximately 5 minutes with one music video at the end.