"Iād say first instar (meaning that they have just hatched and in their first stage of development). The brownish structure nearby is the egg batch that their mother laid, and which they hatched out of. They generally hang out together when young but become solitary as they mature," From ... https://au.news.yahoo.com/aussie-stunned-strange-backyard-find-insect-assassin-bug-061805254.html