Tachina basalis. 



DIPTERA. 281 



than twice its length ; sixth slender, much longer than the third ; chest 

 and breast ivith a f/raj/ covering; chest tcith five Mack stripes : scutcheon 

 ferruginous : abdomen oval, a little shorter than the chest, red on each side 

 toivards the base: ivings sliyhthj gray; veins hlack, tawny at the base; 

 preebrachial vein forming a right angle at its flexure, near which it is 

 inclined inward and is straight from thence to the tip; lower cross -vein 

 with the two usual curves, the upper one very slight : alulae white. Length 

 of the body 4^ lines ; of the wings 9 lines. 



New South Wales. 



Nigro-anea, canescens ; caput aryenteum ; thorax quadrivittatus ; abdomen 

 albo sex-maculatum ; antenncs basi et subtus fulvcB ; genua ferruginca ; 

 aUe sublimpidce. 



Bronze-black with a hoary covering : head silvery wAi<e, clothed behind 

 and beneath with while hairs ; frontalia deep black, triangular, widening 

 very much towards the feelers ; antennaria tawny ; lateralia ferruginous : 

 mouth black, its tip and the palpi luteous : feelers black ; lirst, second and 

 base of the third joint tawny ; third joint full four times the length of the 

 second, deepening from the base to the tip which is slightly rounded ; 

 orifice very near the under side, a little nearer to the base than to the tip : 

 chest with four bronze-black stripes, the inner pair very slender : abdomen 

 oylindric-obconical, longer and narrower than the chest, tessellated with 

 tvhite ivhich forms three large spots on each side : legs black ; thighs with a 

 hoary tinge ; knees ferruginous : irings almost colourless ; veins black, 

 tawny at the base, their borders indistinctly tinged with pale brown ; prte- 

 brachial vein forming a right angle at its flexure, near which it is curved 

 inward, and is straight from thence to the tip ; lower cross-vein with two 

 slight curves, the lower inward, the upper outward and very indistinct : 

 alulae white : halteres yellow. Length of the body 5^ lines ; of the wings 

 10 lines. 



