New York, Sept. 22.- A dispatch to The Herald f rom Vera Cruz says: A correspondent in Pinar del Rió declares that Antonio Maceo's negro rebel bands are completely overrunning the western Cuban districts, burning the settlements, assassinating all pacíficos and ill-treating helpless women. They blow up passenger trains and bridges with dynamite, destroying othef foreign and native property, burning tobáceo fields, and cut down the coffee plantings and thus desolate the entire country. The coast towns are crowded with starving refugees, the sun is obscured by smoke by day and the heavens are lighted by the burn:g of the fields at night. General Weyler is hurrying re-enforcementa into the provinces to check the diré destruction. Letters received here from Santa Clara and other central Cutían towns assert that Captain General Weyler's amnesty decree is a farce. Rebels surrendering and expecting the amnesty therein are assassinated. Though received by the ' Spanish military outposts with open arms and temporarily liberated, are invariably rearrested withín a fortnight as spies or incendiaries, tried and convicted by a drumhead court-martial and shot. It is also allegad that the majority of the prisoners of war taken on the field are being unceremoniously dispatched by1 the roadside, the Spanish commanders afterwards reporting their fate as due to an attempted escape.