The Mariachi reference article from the English Wikipedia on 24-Apr-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Mariachi

For thoughtful child sponsors
Mariachi is a type of musical group, originally from Mexico, consisting of at least two violins, two trumpets, one Spanish guitar, one vihuela (a high-pitched, five-string guitar) and one Guitarrón (a small-scaled acoustic bass).

Mariachi members use a characteristic outfit, consisting of tight trousers, a short jacket, a large bowtie, boots, a wide belt and a large sombrero. The mariachi outfit is also known as "charro" outfit.

Mariachi music has a unique sound, and it is widely used on weddings, birthday parties and even on proms. The mariachi tradition has been extended from Mexico to other countries, particularly Colombia.
Mariachi
Mariachi, showing a guitarron (third person from left to right) and a vihuela (fourth person from left to right)