DESCRIPTIONS OF AUSTKALIAN ^SCHNIN^E. 



47 



II. Species which have developed a pattern of grey or pale brownish on a 

 black or almost black ground, and with it have formed the habit of 

 resting on the dark trunks of trees or on burnt stumps. Their flight 

 is essentially vveaker and less sustained than that of the species in 

 Group I., and they spend much more time in resting. 



Group I. 



Austrocesc/ina tripiinctata, Martin. 

 ,, iveiskei, Forster. 



„ forcipata, Tillyard 



[=z severini, Forster). 

 ,, unicornis, Selvs. 



„ inermis, Martin. 



„ longissima, Martin, 



Group II. 



Austrocusclina parvistigma, Selys. 



„ midtip a aetata, Martin. 



„ atrata, Martin. 



„ anacantha, Tillyard 



(^=aspersa, Martin). 

 „ tasmanica, n. sp. 



„ victoria, Martin. 



The table on p. 48 gives the chief differences between the twelve specie*, 

 and will be found sufficient for their determination. Except in the case of 

 A. victoria, which I have not seen, the measurements given are the average 

 of series examined by me, and are subject to a variation of about +4z %. The 

 colours also are those of mature specimens, wherever possible ; those of 

 ^i. ^oeiskei are probably not fully matured. All measurements are in milli- 

 metres. 



AUSTROJCSCHNA PARVISTIGMA FLAVOMACULATA, n. subsp. 



c? unique. Total length 61 mm.^ abdomen 47 mm., fore-wing 38"5 mm., 

 Jiind-iving 37'5 mm. It differs from the type-form as follows : — 



1. Coloration of head black, marked with bright yellow, viz. two large 

 round spots on top of front, a large patch on either side of front close above 

 post-clypeus ; almost the whole of the post-clypeus bright yellow ; two large 

 geminate subtriangular spots on labrum, a small spot on gense ; labium 

 reddish black. 



2. Coloration of thorax dark brown, with yellow markings, placed as in 

 type-form, but larger and more conspicuous ; markings of sides tending to 

 lengthen out to curved bands. The russet of the middle and hind femora 

 much less developed than in type. 



3. Abdomen almost black, with yellow markings, all larger and more con- 

 spicuous than in type-form. Dorsal spots of basal halves of 3-7 close together 

 and large, isolating between them a black cross. 



4. Segment 10 much broader apically, quite 3 mm. ; apical yellow spots 

 large and wide apart. Hence : — 



5. Superior appendages differing in shape from those of type, being- 

 shorter, 3'7 mm., very wide apart at. bases, thence converging to tips ; 

 distinctly bent at middle so as to appear almost broken ; basal halves much 



