670 Mr. J. R. Mallocli on E.votic Muscariac^. 



lightly and evenly grey-pruiriescent, with a faint dorso- 

 central black vitta and no checkei-ings, tlie margins of the 

 calyptrae are fuscous, and the parafacials white, not yellowish, 

 pruinescent. 



Eyes hairy; narrowest part of frons fully twice as wide as 

 third antennal segment, orbits narrow, setulose on their 

 entire length ; triangle shining in front of ocelli. Thorax 

 as in regince, but with at least one pair of strong presutiiral 

 acrostichals. Legs as in regince, the hind femur with the 

 antero-ventral bristles short and closely placed, extending 

 from near middle to apex, and a few short setulse at apex on 

 postero- ventral surface. 



Length 7 mm. 



Type, Victoria, Australia (C. French), in British Museum. 

 Paratypes, one male, Coaleston, AUyn River, New South 

 Wales, 26. ii. 1921 ; one male, Sydney, New South Wales, 

 30.x. 1921 (Dept. Public Health,''N.S;W.). 



This species runs to Caption 3 in the key to Australian 

 Helinae in Part VE. of this series of papers, but is readily 

 separable from the two species thereunder by the preset ce 

 of at least one strong pair of presutural acrostichal bristles. 



Helina nigrescens, Stein. 



Male. — Entirely black, slightly shining. Thorax grey- 

 pruinescent, rather indistinctly quadrivittate, and with a 

 faint bluish tinge. Abdomen' with grey pruinescence, each 

 tergite 3nth a pair of large, shining, subtriangular, poorly- 

 defined, black spots and the bases of bristles set in black dots. 

 Wings slightly smoky, inner cross-vein distinctly, outer 

 indistinctly, infuscated. Calyptrse grey, margins fuscous, 

 llalteres with black knobs. 



Eyes long-haired ; frons about as wide as third antennal 

 segment ; arista almost bare, except on basal half, where the 

 hairs are a little longer than its basal diameter. Thorax 

 with four pairs of postsutural dorso-centrals, and two or 

 three pairs of well-developed j)resutural acrostichals ; hypo- 

 l)leura bare. Abdomen ovate, the doisal bristles rather 

 ^trong apically. Fore tibia without a median posterior 

 bristle; mid-tibia with three posterior bristles; hind femur 

 with an almost complete series of antero-ventral bristles 

 which are short basally, and some setulose hairs at base on 

 postero-ventral surface; hind tibia with two antero-dorsal, 

 and three or four antero-ventral bristles, and a few setuku 

 on posterior surface at middle. 



Length 5*5 mm. 



