Weird Suspense #4
Title: “The Origin of the Tarantula”
Feature: Tarantula
Medium: comic
Cover date: Sep. 1975
Publisher: Seaboard
Apparently, Atlas Comics (an imprint of Seaboard, not the Marvel precursor) never actually printed a fourth issue of Weird Suspense. But the cover for the fourth issue of the series appeared in a house ad in Cougar #2.