Systematic Study Of Billaea Genus-group Of China (Diptera:Tachinidae)

Billaea genus-group (Billaea, Dinera, Philippdexia) is a an important part of thetribe Dexiini of subfamily Dexinae (Diptera, Tachinidae), whose members are mainlyparasitic on larvae or sometimes adults of Coleoptera and Lepidoptera. It is animportant group of natural enemy insects in agriculture and forestry, and a stabilityregulator of biological control, maintenance balance of ecological community.This is the result of systematic study of Billaea genus-group in which about800specimens from20provinces, Autonomous Region or Municipalities of China wereexamined;9species of Billaea are diagnosed in which4were described as newrecorded to science: Billaea sp.1nov., Billaea sp.2nov., Billaea sp.3nov., Billaeasp.4nov.; the other5species of Billaea from China: Billaea atkinsoni (Baranov,1934), B. fortis (Rondani,1862), B.kolomyetzi Mesnil,1970, B. morosa Mesnil,1963,B. triangulifera (Zetterstedt,1844);17species of Dinera were diagnosed,3species ofwhich were described as new recorded to science: Dinera borealis sp. nov., D.guangxiensis sp. nov., D. nigrisquama sp.nov; the other14species of Dinera fromChina was D.angustifrons Zhang&Shima,2006, D. brevipalpis Zhang&Shima,2006, D. chaoi Zhang&Shima,2006, D. fuscata Zhang&Shima,2006, D.grisescens (Fallén,1817), D.longirostris Villeneuve,1936, D. maculosa Zhang&Shima,2006, D. Miranda（Mesnil,1963), D.orientalis Zhang&Shima,2006,D.setifacies Zhang&Shima,2006, D. sichuanensis Zhang&Shima,2006, D. similesZhang&Shima,2006, D. takanoi (Mesnil,1957), D. xuei Zhang&Shima,2006;1species of Philippodexia new recorded to science: Philippodexia sp. nov. Species ofthree genera were listed in new provincial distribution, and diagnostic figures and thenew keys to species of Billaea and Dinera were given.