EMPIDIDAB AND PIPUNCULIDAE. 



187 



mostly yellowish " ; in the with " the tibiae for some part more brown." * 

 The costal segment between the ends of the mediastinal and radial veins is 

 distinctly longer than the next, as can be seen in text-fig. 6, a drawing made 

 from the type and kindly supplied by Dr. 0. H. Swezey. 



P. vitiensis, the type and $ of which, through the kindness of Dr. Swezey, 



Text-fig. 6. — Pipunculus heterostigmus Perkins (N. Queensland). Wing of type. 



I have been able to examine, has yellow legs like P. limitaris, but the has a 

 narrower face (text-fig. 3 6); a few of the front facets of the eyes below the 

 antennae are distinctly enlarged even in the the disc of thorax is more sliining, 

 with a tendency for the sides and scutellum to be yellowish, and the hypopygium 

 seen from the side is much smaller (text-fig. 7). The frons of the $ (text-fig. 3 c) 

 is very much wider below than above, transversely convex, and sliining black 

 except right in front, where it is clothed 



with greyish dust, the dusting being 

 continued for some considerable distance 

 backwards along the eye margins. The 

 female hypopygium may be somewhat dis- 

 torted in the type, but the oval basal part 



is yellowish on its outer side and black on ^ext-fig. l .-Pifunculus vitiensis Wuiv 

 the side nearest the venter, while the (Fiji). Abdomen of lateral view, 

 yellowish aculeus is as long as this basal 



part, laterally compressed, slender and gradually tapering, and arises from the 

 basal part with rather a distinct break on the side nearest the abdominal venter. 



P. bicolor Becker, a Formosan species described in 1924, probably belongs 

 to this group ; it has the abdomen shining yellow and an abbreviated stigma, 

 though no mention is made of a cross- vein at its base. 



* Perkins pointed out the possibility that the two sexes may belong to distinct species. 



