Ant-Man  (Henry Pym; Scott Edward Harris Lang)
   
     First costumed identity assumed by Avengers founder Henry Pym. 

     He later assumed the aliases Giant-Man, Goliath and Yellowjacket (his current alias), and for a time operated with the Avengers as the plainclothes Doctor Pym. 

     All four of his costumed identities have been assumed by one or more other people. For instance, Scott Lang used Pym's equipment to become the new Ant-Man, joining the Avengers himself before he was slain by the Scarlet Witch. 

     As Ant-Man, Pym could reduce his bodily size at will and wore a cybernetic helmet that enabled him to communicate with and control ants and other higher insects.

Ant-Man (Scott Edward Harris Lang):
     Deceased member of the Avengers (fifty-third recruit, active member at time of death); former Avengers support staff as Lang; former operative of the Fantastic Four; former member of Heroes for Hire. 

  
      Lang first encountered the Avengers as an electronics technician in the employ of their patron, Tony Stark (alias Avengers founder Iron Man). Later, Lang stole Henry Pym's Ant-Man equipment to save his daughter Cassie's life--and when Pym saw the good use Lang made of his gear, he allowed Lang to keep it as the new Ant-Man, with his blessing. 

     Through his friendship with Pym and employment by Stark, Lang became a frequent ally of the Avengers, regarded as an unofficial member of sorts; however, he declined invitations to join their ranks, trying to remain a part-time superhero in light of his responsibilities as a single parent. 

     After losing custody of his daughter to his ex-wife, Lang finally decided to join the Avengers officially, despite his ongoing feud with recent Avengers recruit Jack of Hearts. That feud came to a tragic end when the emotionally and physically unstable Jack helped rescue Scott's daughter from a child-killer and then, on an impulse, decided to blow himself and the killer to bits. 

     Scott Lang continued to serve with the Avengers thereafter until he and several other members were slain by their insane teammate Scarlet Witch. 

     Having secretly experimented with her father's equipment for years, Lang's now-teenage daughter Cassie has developed size-changing powers of her own and joined the Young Avengers as the masked heroine Stature.

.