Mr. J. 1\. ^[allocli on Exotic ]Mu^^caii«Inc. GG7 



(iClUlS AUSTRALOI'IIVKA, llOV. 



Generic Characters. — Diflcrs from OjiJnira in liavinj]^ tlio 

 hyi)0[)leiira uitli moderately long black hairs on npi)er mar- 

 ^\\\ below and in front of the spiracle, the ocellar triangle 

 very short, with the craciate bristles well in front of its 

 anterior extremity in female, and the orbits not polished in 

 that sex. The ptilinnni in neither sex has silvery pubescence. 



Genotype, Oplujra anaVis, Macqnart. 



This species appears to be ol' Australasian origin, and 

 differs in the above characters from the species of Ophyra 

 from any other region, and also from the two species of 

 Ophijra that occur in Australia. 



I have before me sprcimens of analis from South Queens- 

 laud and New South Wales. 



Genus HYDROTiEA, R.-D. 



Hydrotcea australis, sp. n. 



Male. — Black. Thorax shining, with very faint grey 

 pruinescence that is only distinct laterally, no distinct vittse. 

 Abdomen subopaque, basal tergite black, apical three densely 

 pale grey-pi'uinescent, with a black dorso-central vitta which 

 is much tapei'ed posteriorly. Legs black. Wings slightly 

 brownish basally. Calyptrse brownish. Halteres with black 

 knobs. 



Eyes bare, subcontiguous below ocelli j parafacials not 

 visible from side ; cheek almost linear ; arista subnude. 

 Thorax with four pairs of postsutural dorso-centrals, and 

 four pairs of moderately long presutural acrostichals ; hypo- 

 pleura bare. Abdomen ovate. Fore femur with two spines 

 at base of apical concavity^ the apical one slender, the second 

 one much swollen basally ; mid-femur with four or five fine 

 straight bristles on basal half of postero-ventral surface and 

 rather numerous long setulose hairs on basal half of antero- 

 ventral surface ; mid-tibia and tarsi normal, the former with 

 two posterior bristles ; hind femur normal, with two or three 

 short preapical antero-ventral bristles ; hind tibia normal, 

 with very fine short erect hairs along antero-dorsal surface, 

 two fine antero-ventral bristles, a few erect setulose posterior 

 hairs, and tlie postero-dorsal bristle practically indistinguish- 

 able. Outer cross-vein almost straight ; penultimate section 

 ot fourth vein not longer than outer cross-vein and barely 

 one-third as long as last section. 



Female. — Differs from the male in being rather densely 



