two or three stout bristles at the tip; the entire structure is very similar to that of Electrobata tertiaria. The 6th sternite is triradiate like in Metopochetus, but like in Eurybatini not compressed laterally and with a trough-like channel in the middle. The subepandrial sclerite of male Badisis has a very small prominence with a minute setula at its tip. The aedeagus with its moderately long two-segmented distiphallus resembles that of Metopochetus subgenus Crus. On the other hand, the ejaculatory sclerite of Badisis is unlike that of any known Metopochetus, with a rod-like apodeme expanded at the tip like a mushroom-head. Females show the conventional postabdominal structure of stilt-legged flies. Legs The coxa of the forelegs has a tooth-like lobe on the lower forward end. Such a feature is apparently only found in Badisis and Metopochetus. The tibiae of mid- and hindlegs bear fine hairs (setulae) and numerous but scattered thicker bristles. Ecology and status Males are far more often seen than females; the latter were only described 8 years after the former. As far as is known, B. ambulans inhabits sclerophyll forest, where the males are occasionally encountered on flowers of the Myrtaceae shrub Astartea fascicularis. If they feel threatened, they will try to escape by hopping and letting themselves drop down to the ground where they can hide. The larvae have to date only been found in the pitchers of the Albany Pitcher Plant (Cephalotus follicularis). This carnivorous plant has a limited range in southwestern Western Australia, effectively restricting the fly's range also. Most significantly, the plant is found in the Warren, Jarrah Forest and Esperance Plains biogeographic regions. The conservation status of B. ambulans has not been evaluated yet. The Albany Pitcher Plant is classified as a Vulnerable species by the IUCN. Its numbers are declining, mainly due to habitat destruction and collecting for horticulture (though there is by now a good supply of culture-grown plants, which are also far easier to maintain than those collected from the wild). The Albany Pitcher Plant prefers somewhat moister habitat than the fairly arid locations where adult B. ambulans have been collected. Thus, either that the adult flies are more mobile than their winglessness suggests, able to walk for prolonged distances, and consequently more resilient to local extinctions of the Albany Pitcher Plant. On the other hand, the flies might be restricted to the dry spectrum of the plant's habitat,