New York, June 21. Thu stenmers Colombia and DöSoto, froin Havana tho 20th, hav.. érffved Yellow Pever has made its nppearance at Havana, but nrí, j'et ainong the shippmg. It is reported that five important towns in the interior oí' SL. Domingo had buen fortitied and nssisted by the Haytiens, wiio intendeu to re.-ist the Spanish progresf. there. It is stated that the inhabitants of one yjjlnge thcre bad been massaored by the Spaniards for refusing to eweár allegiancu to Spain. It i.s ule o reported that the Spanish troops were defeated id small engigements, Additional troops were being sent from Havnna for rtinforcetnents. At Havana intense excitement exists relative to aQaira in the States. Stock of Silgar 315,090 buxe. The DeSoto has the mail bags oí tho last steamer.