NEW YORK — Those grand masters of evening — Bill Blass and Oscar de la Renta — are at it again for pre-fall, sending out knockout evening looks that run the gamut from light-as-air lace and chiffon to dramatic velvet column dresses. Meanwhile, Carolina Herrera favors proper day suits in cotton velvet and fake crocodile, but likes lizard-patterned velvet at night. And at Givenchy, Alexander McQueen is doing fitted coats in rich jacquard or leather and downright “Dallas”-esque cocktail suits. Here, a roundup.