38 R. W. CROSSKEY 



Some members of the dufouriine-imitomyiine complex are strikingly phasiine in 

 their total facies (for example, Freraea Robineau-Desvoidy) whilst others (such as 

 Imitomyia Townsend) have very much the facies of those Prosenini that have a 

 heavily carinate face. The beetle hosts and, to some extent at least, the male 

 genitalia suggest that the true affinities are with the Proseninae-Tachininae rather 

 than the Phasiinae, but van Emden treated the dufouriines as a tribe of Phasiinae. 

 The Oriental Tachinidae may be more homogeneously defined at the subfamiliar 

 level if the few dufouriine-imitomyiine genera are excluded from either the Phasiinae 

 and the Proseninae; hence their current temporary recognition as part of a small 

 subfamily separate from both of these major subfamilies. I am not attempting 

 here to give a diagnosis for the subfamily, but the main features can be derived 

 from accompanying characterizations for Dufouriini and Imitomyiini (which 

 tribes are separable by use of the following key). 



Key to Oriental Tribes of DUFOURIINAE 



Head with a heavy facial carina that is visible when head seen in profile (Text-fig. 31) 

 and separates large antennal foveae. Head almost completely holoptic in both 

 sexes; eyes of $ with uppermost facets enlarged. $ terminalia exserted and with a 

 pair of strongly sclerotized dorsal lamellae bearing recurved spines or long setulae 



IMITOMYIINI (p. 41) 



Head without a facial carina. Head holoptic or almost so in <J and widely dichoptic 

 in $; eyes nearly always with uniformly small facets in both sexes, exceptionally 

 with uppermost facets enlarged in q\ $ terminalia not exserted, invisible on 

 pinned fly [but in the form of a long exserted tube in some non-Oriental forms] 



DUFOURIINI (p. 38) 



Tribe DUFOURIINI 



This is a small group containing parasites of chrysomelid and curculionid beetles 

 that is very poorly known in the tropical parts of the world. The tribe Dufouriini 

 as here recognized is more or less equivalent to the three subtribes Dufouriina. 

 Campogastrina and Freraeina that Mesnil (1975a) recognizes taken together. The 

 approach used for the present work differs, however, from that of Mesnil in some 

 minor respects, as will be evident from the brief consideration of the genera occurring 

 in the Oriental Region that follows. 



Within his subtribe Campogastrina Mesnil (1975a : 1358) has split the genera 

 rather finely, describing a new genus (Paraptilops Mesnil) for two of his own species 

 originally described in Chetoptilia (one from Philippines, the other from Madagascar), 

 and recognizing Afrophasia Curran as a valid genus distinct from Pandelleia 

 Villeneuve. I am myself, however, doubtful whether it is really justified to split 

 the genera so finely in this group, and prefer therefore to take a broader approach. 

 In doing so it is not necessary here to discuss the possible synonymy of Afrophasia 

 and Pandelleia as this complex is not known from the Oriental Region, but it is 

 pertinent to comment in more detail on the status of Paraptilops. 



This genus is proposed by Mesnil for Chetoptilia angustifrons Mesnil (Oriental) 



