50 MR. R. J. TILLYARD : LIFE-HISTORIES AND 



A b d o m e n. — 1-2 much swollen, 3 much pinched near base, rest gradually 

 widenino- to 10, which is 3'5 mm. wide. 1-2 hairy, brown with irregular 

 black markings ; 3-8 with transverse black carina, a pair of oval dorsal spots 

 close together, and crossed by the carina ; also, low down on each side, a 

 laro-er oval mark crossed by the carina, and, on each side, a flat apical mark : 

 all markings pale brown in the dead insect. 9, 3 mm. long, pale brown, with 

 a black dorsal arrowhead-mark pi'ojecting from base to middle, and on each 

 side a large basal black blotch. 10 black, rounded above, with a very large 

 dorsal nodding tubercle ; a broad pale brown apical band passes under the 

 base of the tubercle. 



Appendages. — Superior wide apart, 4 mm., black, hairy, bases nar- 

 rowed, then slightly widening and curving inwards to tips, which are bluntly 

 pointed outwards and about 1-5 mm. apart. Inferior very broad and short, 

 1"5 mm. long by 2 mm. wide, base slightly narrowed, end strongly bifid, 

 black (Plate 9. figs. 11-12). 



Type : $ unique, Hobart Museum (Hobart, February 1892). 



This peculiar species, which Mr. Robert Hall, Curator of the Hobart 

 Museum, kindly sent me for study, is without doubt very distinct from all 

 other known species of the genus in possessing its remarkable bifid inferior 

 appendage, and in the huge tubercle or spine on segment 10. It appears to 

 be most closely allied to A. atrata, Martin. 



AuSTROiESCHNA INERMIB, Martin. 



? unique. Total length 61, abdomen -i^, fore-ioing 43, Mnd-ioing 42 mm. 



Wings. — Neiiration strong, black, except costa which is pale yellowish. 

 Thickened antenodals on the first, and the third or fourth. Nodal Indicator 

 I'l9ll3' ^^IS^'^I- Pterostigma 3 mm., yellowish brown. Membramde whitish, 

 fore 1 mm., hind 2*5 mm. Triangles 3-celled. Anal loop very small, 

 5-6-celled. 



Head. — Eyes moderately large, meeting for 1-7 mm. ; postocular triangle 

 yellow ; vertical tubercle and base of front dark brown ; front yellow above, 

 with a large brown T-mark, the cross-piece of which spreads downwards 

 over the vertical portion as far as the postdypeus ; the latter brown with a 

 transverse yellow band next front ; ante-dypeus dark brown ; lahrmn dark 

 brown with a pair of small yellow central spots separated by a brown line ; 

 gence yellow ; labium dark brown. 



Thorax.— Large, with strong dorsal ridge, on either side of which lies 

 a small curved yellowish band, thin and indistinct. Ground-colour rich 

 chocolate-brown ; sides with broad and fairly straight humeral and lateral 

 bands, and a sublateral yellowish line ; underside brown with grey hairs. 

 Legs long, strong, black, most of femora dark reddish brown. 



A b d o m e n. — 1-2 much swollen, 3-10 cylindrical. Colo^ir dark brown, 

 marked as follows :— 1, paler dorsally ; 2 with four pointed yellow marks 



