16 



R. W. CROSSKEY 



used with some caution: hosts for most Oriental Tachinidae are still unknown, the 

 key is based on generalizations from what is known, and it cannot be absolutely 

 guaranteed that every tachinid will belong to the subfamily or tribe indicated even 

 if the host group agrees. 



PARTIAL KEY TO ORIENTAL SUBFAMILIES OR TRIBES ACCORDING TO 



HOST GROUPS 



[Note. No Oriental Tachinidae appear yet to have been recorded as parasites of Diptera, 

 Mantodea or Phasmatodea. These orders therefore do not appear in the key.] 



i Host insect belongs to a hemimetabolous (exopterygote) order .... 2 



- Host insect belongs to a holometabolous (endopterygote) order .... 4 



2 Host belongs to the Hemiptera PHASIINAE (p. 16) 



- Host belongs to the Orthoptera ......... 3 



3 Host is a grasshopper or locust (Acridoidea) Acemyini (p. no), check also Phorocevosoma 



[Phorocerosoma in Ethillini parasitizes grasshoppers in Japan and can be expected 

 to do so in Oriental Region where its hosts are not yet known.] 



- Host is a bush-cricket or cricket (Tettigonioidea or Grylloidea) 



[possibly Ormiini or Glaurocarini] 

 [No Oriental tachinids are yet known to have hosts in these groups but Ormiini 

 and Glaurocarini parasitize them in other regions.] 



4 Host belongs to the Hymenoptera ......... 5 



- Host does not belong to the Hymenoptera ....... 6 



5 Host is a wasp (Vespidae or Eumenidae) .... Anacamptomyiini (p. 126) 



- Host is a sawfly (Symphyta) . . some GONIINAE (check Sturmiini or Blondeliini) 



[Some Palexorista (Sturmiini) parasitize sawflies in Oriental Region. There 

 are no records for Blondeliini doing so, but members of this tribe attack sawflies 

 in other regions.] 



6 Host belongs to the Lepidoptera 



most TACHININAE (p. 53) and most GONIINAE (p. 106) 

 [Any tachinid reared from a lepidopteran is nearly certain to belong in Tachininae 

 or Goniinae. Doleschalla (Proseninae) is, however, a parasite of a swift-moth 

 in India.] 



- Host belongs to the Coleoptera 



7 Host belongs to the Scarabaeoidea 



Host does not belong to the Scarabaeoidea 



Host is an adult scarabaeoid beetle 



Host is a larval scarabaeoid beetle 



Host belongs to the Chrysomelidae . some Blondeliini (p 



Host belongs to another family . some PROSENINAE (p 



Palpostomatini (p. 57) 



PROSENINAE (p. 43) 



113) and Dufouriini (p. 38) 



43) and Blondeliini (p. 113) 



SUBFAMILY PHASIINAE: KEYS TO THE TRIBES AND GENERA 



The Phasiinae are biologically homogeneous because they parasitize Hemiptera 

 and are the only Tachinidae that do so. Morphologically, however, they are very 

 varied, and this makes the subfamily difficult to define and key out satisfactorily 

 on external adult characters. An attempt to categorize them on the basis of adult 

 morphology has been made elsewhere (Crosskey, 19736 : 30) and the features they 

 possess need not be repeated here. But it is perhaps worth making the point that 



