"Cascarones" not in OED?

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CASCARONES--101,000 Google hits
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No "cascarones" in the OED? OED editors never celebrated a festive Easter with cascarones before?
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10 January 1857, Daily Evening Bulletin (San Francisco, CA), pg. 1:
And such quantities of egg-shells were broken on the heads of men and women, old and young, bald and covered, that it seemed the people would get crazy with laughing. They danced out the whole night, and went hime in love with dancing, music and cascarones, determing to keep it up a whole week of nights if they could pay for the music,...
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5 April 1915, San Jose (CA) Mercury Herald, pg. 7:
A battle of cascarones, egg-shells filled with confetti, was almost continuous throughout the evening, according to the ancient custom for the night before Easter, and refreshments were served in the Mexican style.
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12 April 1938, Albuquerque (NM) Journal, pg. 7, col. 2:
"Cascarones," colored egg-shells filled with confetti, and the breaking of the "pinata," bag filled with novelty gifts, furnished entertainment for the guests of Rosita Trevino at her birthday party Saturday.
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http://en.wikipedia.org/wiki/Cascarones
Cascarones or confetti eggs are festive, hollow chicken egg shells, filled with confetti, meant to be thrown or broken over someone's head (usually as a surprise from behind), scattering confetti all over the person. Breaking the eggs over someone's head can be quite painful if done hard enough, however, this is most often done between friends, usually teenagers. Cascarones derived from Mexico and have recently regained popularity in the southwestern United States. They are used for many different occasions but, especially Easter. Having one broken over your head is said to bring good luck.
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http://www.latinworksco.com/cascarones.html
  
CASCARONES
What are Cascarones ? 
Cascarones are confetti filled egg shells hand painted and brightly colored.
Cascarones’ egg shell have a very small opening on one end and the inside is drained out. The empty shell is thoroughly washed and then dried. The clean shell is now filled with confetti and sealed with a tissue paper. Cascarones are brightly colored. 
How did Cascarones originate? 
Cascarones have an uncertain beginning, however historians have traced their birthplace back to China. It’s believed that they were brought from Asia by Marco Polo. These original eggs were filled with a perfumed powder and the eggs were used as gifts. From Italy the tradition was carried to Spain and then to America. Carlotta, the wife of Emperor Maximillian, was so fascinated by the eggs that she brought them to Mexico during her husband’s rule in the mid 1800’s. 
In Mexico people replaced the perfumed powder with confetti. It was then when Mexicans labeled the egg shells.... Cascarones... Which derives from the word "Cascara" which means shell. In Mexico Cascarones were popular at one time, but the tradition eventually faded. Only in the late 1960s and early 1970s Cascarones regained popularity in South Texas, where it has now become a family tradition. Some make very creative Cascarones' designs that sell for as much as $10 for one Cascaron. 
Throughout Mexico and the American Southwest, Cascarones are used to celebrate. The fun is derived from breaking the egg over someone’s head; allowing the confetti to spill out. Prior to Easter, or during “Fiesta San Antonio” churches and schools do fund raisers by selling Cascarones. Others just enjoy cracking them over their friend's heads. Many say... the confetti shower brings good luck and good fortune ! but if anything they are lots of fun and almost addictive !!
Do Cascarones have a religious link? 
It’s believed that Cascarones represent the Resurrection of Jesus Christ; the breaking of the egg symbolizes how Christ had risen from the tomb, just like a new born chick opens the shell. 
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