TACHINIDAE OF ORIENTAL REGION' 37 



weak post ia seta (preceded by hairs); 1-2 prst dc setae; ? 3 post dc setae; prst acr setae un- 

 differentiated; post acr setae probably absent; pra seta absent; one strong supra-alar seta 

 (set well forwards in almost the pra position) ; postalar callus with one strong seta and a small 

 setula; one propleural seta, one prostigmatic seta; two stpl setae (anterior one smaller and 

 set slightly downwards as though it is the lower one of a normal 2 + 1 arrangement) ; one 

 long fine pteropleural setula (pteropleuron otherwise bare); four long hypopleural setae; 

 infrasquamal setulae absent; scutellum with two pairs of marginal setae (moderately strong 

 crossed horizontal apicals and a pair of strong setae in a sub-basal position) and without discal 

 setae; scutellum slightly rotund, postscutellum convex but not very large; posteroventral 

 declivity of the thorax entirely sclerotized but not very deep. Legs rather short and robust; 

 fore coxa bare cm anterior surface except for an irregular row of very few long hairs on the 

 outer part; hind coxa bare on posterodorsal surface, lower surface prominent and bearing 

 strong black pointed spines; apical parts of femora with small av and pv spinules; tibiae almost 

 entirely without setae except apically, one of the mid tibiae with a small ad setula and hind 

 tibia with two inconspicuous ad setae; tarsal segments very short, none of the tarsi flattened. 

 Wings hyaline; cell R s widely open at the wing apex; vein M without a definite bend, only 

 curving very weakly forwards on the apical part; m-cn straight, forming a right-angle with M 

 and an angle slightly less than a right-angle with the penultimate section of Cu 1 ; last section 

 of Cu l about two-thirds as long as m-cu; costal vestiture hair-like, second costal sector bare 

 ventrally ; veins entirely bare; lower calyptrae very small and subcircular (as in Rhinophoridae). 

 Abdomen strongly convex on upper surface and shining, moderately broad basally and tapering 

 on distal half, appearing trisegmented seen from above (? first 'segment' composite Ti + 2 

 and T3) (cf. Catapariprosopa in Cylindromyiini) ; first 'segment' with strong spinous lateral 

 setae and a pair of median discal setae, other segments with short stiff spinous setae and setulae 

 lateroventrally and without setae dorsally; terminalia slightly recurved, complex, apparently 

 female; sternites of basal part of abdomen widely exposed in broad membranous area. Size 

 very small, body and wing length about 3 mm. 



According to Malloch (1926), in the original description, the holotype from which 

 the above-cited characters have been taken is male, but in my opinion it is more 

 probably female (with unusual postabdominal modifications) ; it is not vital to 

 resolve the sex at the present time and I have therefore not removed the terminalia 

 from the unique specimen for critical examination. Finally, it should be noted 

 that Malloch himself had no doubts - as the name indicates - that Cylindromyiella 

 is a very close relative of Cylindromyia Meigen, and thus by implication that it 

 should be placed in Cylindromyiini. This may prove to be the case when the 

 genus becomes better known, and if so it is suggested that it could well have close 

 phyletic affinity to Catapariprosopa. 



SUBFAMILY DU FOU R 1 1 X AE : KEYS TO THE TRIBES AND GENERA 



This subfamily includes a diversity of small genera, the members of which 

 parasitize Coleoptera. As employed here the subfamily corresponds approximately 

 to the tribe Dufouriini as recognized by van Emden (1945; 1954) and not to the 

 broader subfamiliar concept, as yet inchoate, that is being developed by other 

 workers. This approach is essentially one of convenience which for present, 

 practical, purposes cuts off a small number of Oriental genera (as yet known from 

 very few specimens) that obviously belong in the Dufouriini and the Imitomyiini, 

 but which - like the other members of these tribes - combine in their external 

 adult morphology many of the features of both Phasiinae and Proseninae (Dexiinae). 



