238 Mr. J. R. Malloch on Exotic Muscaridse. 



*■ 



very short ; sternopleurals 1:2; hypopleura bare. Basal 

 abdominal sternite bare; seventh sternite with a pair of 

 short stout bristles at apex. Fore tibia unarmed at middle ; 

 mid-tibia with two posterior bristles ; hind femur with a 

 few bristles on apical half of antero-ventral surface ; hind 

 tibia with one antero-dorsal and two weak autero-veutral 

 bristles. Third wing-vein with some rather strong setuhe 

 at base ; fourth vein but slightly curved forward at apex. 



Length 8 mm. 



Type, South Queensland, 1911 {Dr. T. L. Bancroft). 

 One specimen. 



This is the only species of this genus known to me which 

 is pale in colour. It is apparently a typical species of 

 Myiospila, possessing the wing-characters of the genotype 

 and the cruciate interfrontal bristles as well as the ventral 

 bristles near apex of abdomen, which this genus has in 

 common with Mydaa in the female sex. 



Genus Idiohelina, nov. 



Generic characters. — Belongs to the subfamily Phaoniinse, 

 and is closely related to Helina, Robineau-Desvoidy. Differs 

 from all allied genera known to me in having the marginal 

 cell of uniform width almost to its apex, whereas in other 

 genera it is gradually narrowed from apex of first vein to 

 its apex, the apical half of the cell being narrowly wedge- 

 shaped. The scutellum has some fine hairs below at apex — 

 a character almost invariably found 'in An thorny iinai, but 

 rarely in Phaoniinae. In other respects as Uelina. Prealar 

 absent. 



Genotype, the following species, 



Idiochelina nubeculosa, sp. n. 



Female. — Testaceous yellow, shining. Third antennal 

 segment and the abdomen largely fuscous. Wings yel- 

 lowish, cross-veins conspicuously infuscated, apices of wings 

 with a faint fuscous oloud. 



Frons about two-fifths of the head-width ; orbits not 

 differentiated, each with about five unequal-sized bristles ; 

 face almost vertical ; parafacial not as wide as third antennal 

 segment, at middle half as wide as height of cheek; arista 

 with sparse long hairs ; antennae extending to three-fourths 

 the length of face ; palpi normal. Thorax without any 

 strong presutural acrostichal bristles ; postsutural dorso- 

 ceutrals 3 ; sternopleurals 1 : 2. Fore tibia without a 

 median posterior bristle ; mid-tibia with one posterior 



