LIFE-HISTORIES AND DESCRIPTIONS OF ADULTS AND IMMATURE STAGES OF 2 CRYPTIC SPECIES, ACIURINA-FERRUGINEA (DOANE) AND ACIURINA-MICHAELI, NEW SPECIES (DIPTERA, TEPHRITIDAE), ON CHRYSOTHAMNUS-VISCIDIFLORUS (HOOKER) NUTTALL IN SOUTHERN CALIFORNIA

Aciurina ferruginea (Doane) and the newly described species, A, michae li Goeden, are sympatric univoltine fruit flies that form different, d istinct types of axillary bud galls on branches of high-elevation plan ts of Chrysothamnus viscidiflorus (Hooker) Nuttall in southern Califor nia. Both species heretofore were called A. ferruginea; however, the g all attributed to this species in the literature in actuality belongs to A. michaeli. Accordingly, the gall of A. michaeli is smooth and bea ked apically; the gall of A. ferruginea is subspheroidal and covered b y many thin, threadlike leaves, its shape apparently unlike other teph ritid galls described to date. The adults of A. michaeli are described as having a wholly dark brown or dark reddish-brown scutellum that re adily distinguishes them from A. ferruginea which have a yellow or red dish-yellow scutellum. The slightly sexually dimorphic, but otherwise indistinguishable, wing patterns of both species are described and ill ustrated. The egg, third instar, and puparium of A. michaeli and A. fe rruginea are described, illustrated and compared. The first and second instars of A. ferruginea also are described and illustrated. The eggs of both species have long pedicels that allow respiration by embryos within egg bodies buried during oviposition in axillary buds covered b y resin. The third instar of A. michaeli is pyriform with abdominal te rgites III-VI protrudent; the third instar of A. ferruginea is oblong- ellipsoidal. The prothorax in A. michaeli lacks the verruciform sensil la that circumscribe the prothorax in A. ferruginea in a single row. T he anterior thoracic spiracles in A. michaeli have three or four papil lae; whereas, A. ferruginea have five papillae. The puparium of A. mic haeli is pale yellow; that of A. ferruginea is light to reddish-yellow .