332 IX«ECTA SAUNDERSIANA. 



more than twice the length of all the preceding joints : breast with a ci- 

 nereous covering: abdomen testaceous, elliptical, a little shorter and broader 

 than the chest: /e^s taivny; feet black: ivings very slightly gray; veins 

 black, tawny at the base ; praebrachial vein I'orining a very obtuse angle at 

 its flexure, beyond which it is hardly inclined inward, approaching very 

 near the tip of the cubital vein ; lower cross-vein with the two usual curves, 

 the lower inward one rather deeper than the other: alulae dingy white 

 with luteous borders. Length of the body 3^ lines ; of the wings 7 

 lines. 



South Australia. 



( ^ 



MUSCA OCCIDENTIS. VtOH^^-^C^t^/^^i 



Nigra, canescens ; caput album; thorax fusco quadrivittatus ; abdomen 

 cinereum, fusco sexmaculatum ; genua fulva ; ahe sublimpida. 



Fern. Head with a white covering ; frontalia broad, black, ferruginous 

 towards the feelers ; facialia without bristles ; epistoma slightly prominent : 

 eyes bare : mouth a little shorter than the chest ; palpi long, slender, 

 tawny : feelers black, with a hoary covering ; third joint deep, almost trun- 

 cated at the tip, not reaching the epistoma, more than twice the length of 

 the second ; sixth tawny, stout towards the base, feathered almost to the 

 tip with long hairs, longer than the third : chest ivith a hoary covering and 

 with four brorvn stripes : abdomen cinereous, obconical, not longer than the 

 chest ; second and third segments with three brown spots, the middle one in 

 advance, larger than the other two : legs black ; knees tawny : wings almost 

 colourless; veins black, tawny at the base; praebrachial vein forming a 

 very gentle curve at its flexure, very slightly bent inward towards the tip, 

 joining the border below the tip of the wing ; lower cross-vein very slightly 

 bent inward in the middle : alulae white : halteres pale yellow. Length 

 of the body 3 lines ; of the wings 6 lines. 



United States. 



