Two new species of Ortalotrypeta Hendel,O.costamacula Chen&Wang,sp.nov.and O.straighta Chen&Wang,sp.nov.from Shannxi,China are described and illustrated,together with their adult habits and behaviors.The biological observation of another three species,O.gansuica,O.trypetoides,and O.ziae,are also reported here.The biological reports are the first time for the tribe Ortalotrypetini,subfamily Tachiniscinae.An updated key to the genus Ortalotrypeta is provided.