422 Mr. J. "R. Mallocli on Exotic Muscaridffi. 



Genus Papuaia, nov. 



Generic characters. — Similar to DichcBtomyia, differing in 

 having the pteropleura bare, the hypopleura with some long 

 hairs on upper margin in front of spiracle, metathoracic 

 sj)iracle without setulose hairs overlying spiracular flap, and 

 the prealar bristle absent. The anterior intra-alar bristle 

 is absent in the only specimen I have before me. 



Genotype, Mydcea rufescens. Stein. 



The specimen bears labels similar to those borne by 

 Dichcetomyia bifasciata, Stein, but the name is Aricia 

 ochromyoides, Walker, MS. 



Genus Spilopteromyia, nov. 



Generic characters. — Similar to Papuaia. Differs from 

 it in having the hypopleura bare. Prosternum bare ; ptero- 

 pleura with some hairs in centre, scutellura with the hairs 

 invading ventral surface from the sides; no hairs along 

 lower margin of metathoracic spiracle ; thiid wing-vein 

 setulose at base below ; anterior intra-alar and prealar 

 present, but not strong; fourth vein distinctly bent forward 

 at apex ; hind tibia without postero-dorsal bristles, the apical 

 dorsal bristle very short. 



Genotype, Spilogaster apicata, Stein. 



I have before me two specimens from Colombia, South 

 America {Dr. A. Balfour). 



In order to make clear the distinctions between the three 

 genera just dealt with, I append a syno|)sis of the characters 

 for their separation. All have the pteropleura hairy in 

 part : — 



1. Prosternum with liairs on sides; meta- 



thoracic spiracle with setulose hairs 

 along lower maigin and overlying the 



spiracular flap Dichcetomyia, Malloch. 



Prosternum bare ; metathoracic spiracle 

 without setulose overlying hairs 2. 



2. Hypopleura with hairs on upper margin 



in front of spiracle ; scutellum without 



hairs on sides Papuaia, gen. nov. 



llypojileura bare; scutellum with hairs 

 on sides which invade ventral surface 

 laterally Spilopteromyia, gen. nov. 



Limnophora spreta, sp. n. 



Male. — Black, slightly shining, with dense whitish pruin- 

 escent markings on thorax and abdomen. Thorax with 



