I-Horsefly sisinambuzane sosapho lweempukane. Zininzi iindidi zeziqhoboshi. IiHorseflies zifunxa igazi lezilwanyana okanye abantu ukuba bazondle. Zimalunga ne-1-2 yeesentimitha ubude kwaye zinamaphiko amabini kuphela.
Iimpukane zibeka amaqanda amaninzi amancinci. Umbungu uqandusela eqandeni. Xa le mbuthu ithe yahlutha, kuphuma impukane entsha kuyo. Zinokuba yinkathazo yokwenyani kwiintsuku ezishushu, ezinomdaka ehlotyeni. IiHorseflies zinokusasaza izifo ngokuhlaba kwazo.
Ukuba ihashe iyaluma, unokuyiva kwangoko njengoko ulwamvila lubuhlungu kakhulu. Iimpukane zitsalwa kukubila kwaye ziyakuluma nakwimpahla. Zixhaphake kakhulu kufutshane neenkomo okanye amahashe. Izilwanyana zihlala zizigxotha izinambuzane ngemisila yazo. Basebenzisa iindlebe zabo ebusweni babo. Iinkomo ziye zaphumelela ngakumbi koku, kuquka nendawo yamehlo.