This review is the first comprehensive treatment of the biology of non
frugivorous fruit flies of the family Tephritidae. Feeding habits of d
estructive and useful species, morphology of immature stages, and hypo
theses regarding structural homology and the evolutionary biology of n
onfrugivorous tephritids are reviewed, including zoogeography and theo
ries involving resource heterogeneity, guild structure, resource parti
tioning, resource utilization, facultative niche exploitation, extrins
ic and intrinsic factors, host associations, seasonal distribution and
phenology, aggregative and circumnatal life history strategies, volti
nism, diapause, aestivation, oviposition site, clutch size, and supern
umerary oviposition.