DESCRIPTION OF IMMATURE STAGES OF TRUPANEA-CONJUNCTA (ADAMS) (DIPTERA, TEPHRITIDAE)

The pre-imaginal stages of Trupanea conjuncta (Adams) are described. T rupanea conjuncta is a narrowly oligophagous, univoltine, nonfrugivoro us tephritid in southern California. The third instar larva differs fr om previously studied Tephritidae, including six congeneric species, i n that the integument is finely punctate posterior of the prothorax an d the median oral lobe bears lateral projections. The metathoracic lat eral spiracular complex consists of a single spiracle unaccompanied by any sensilla; the abdominal lateral spiracular complex consists of a spiracle and two verruciform sensilla. Thus, the lateral spiracular co mplex is the only morphological feature observed to differ among third instars of all seven species of Trupanea studied to date. The first a nd second instars of T. conjuncta differ from the third instar in that the integument is smooth, without punctuation.