none Reproduction; Reproductive behaviour; Life cycle and development; Life cycle; Developmental stages; Evolution; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Host parasite relationships; Ecology; Population dynamics; Land and freshwater zones; Nearctic region; North America; USA Batrachedra striolata (Momphidae); Hymenopteran hosts; Pontania; Host mortality on plant, variation between populations; Reaction of host to parasite; Pontania (Hymenoptera) mortality on plants variation; Arizona; Flagstaff & Oak Creek; Hymenopteran host mortality variation on plants Pontania (Tenthredinidae); Breeding season; Oviposition timing; Oviposition; Timing, interpopulation variation; Related to larval mortality & insect parasitism; Larva; Development phenology, variation between populations & related mortality; Variation, plant host; Larval mortality from plant & insect parasites relations; Hymenopteran parasites; Bracon; Eurytoma & Pteromalus; Lepidopteran parasites; Batrachedra striolata, variation between populations; Oviposition & development phenology relationship; Plant hosts; Salix lasiolepis (arroyo willow); Oviposition & larval phenology, mortality & insect parasitism; Reaction of host to parasite; Larval mortality; Mortality; Larvae, effects of plant host & insect parasites; Variation between populations in relation to phenology; Arizona; Flagstaff & Oak Creek; Oviposition & larval development phenology, variation &; Larval mortality from plant host & insect parasites relationships Bracon angelesius (Braconidae ); Eurytoma fossae (Eurytomidae ); Pteromalus (Pteromalidae ); Hymenopteran hosts; Pontania; Host mortality on plant, variation between populations; Arizona