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



to it, yet specimens received by me from Queensland (Plate 4. fig. 8) show 

 almost as mucli " double-cm-ving '^ of Cu.2 as can be found in Hemianax 

 epJiippif/er. Cuo is essentially variable in form in A. j^apuensis. For that 

 reason I should prefer myself to suppress the genus Hemianax altogether, 

 simplj^ considering papuensis, and especially epliipp)iger, as the most reduced 

 and specialized types yet attained within the genus Anax. Their smaller 

 size and dull coloration are really the most const'int characters by which these 

 two species differ from the rest, and quite possibly suggested the original 

 proposition of Hemianax as a distinct genus. 



Larva. — Total length 46, greatest hreadtli 8*5 mm. across eyes and also 

 across segment 7. H e a d. — Flat above, with large eyes and smooth rounded 

 postocidar lobes. Labium. — Mentum 7-5 X 5*5, reaching to between meso- 

 coxse, where it narrows to 3 mm. (Plate 5. fig. 14). Median lobe projecting 

 obtusely, subtriangular, carrying a row of short hairs. Lateral lobes much 

 as in j^sclina brevistyla, but somewhat shorter and broader ; apex truncate, 

 but more rounded at the outer angle ; tooth of inner angle smaller ; movable 

 hook 1"9 mm. (Plate 5. fig. 9). Thorax. — Prothorax very narrow and 

 compressed, without lateral spines. Meso- and metatJiorax strongly built, 

 smooth, no spines; wing-cases 10 mm., that of hind-wing 3 mm. wide; 

 venation very distinct. Legs long and slender, hind femur lO'S mm. ; 

 dark olive-green with many paler bands. Abdomen. — Of the usual 

 shape, fairly flat beneath ; no dorsal spines ; lateral spines on 7-9, those 

 of 7 small, 8 medium, 9 fairly large, reaching to level of middle of 10. 

 Appendages. — Superior 5 mm., tip strongly bifid; inferiors 5"5 mm., 

 very sharp (Plate 7. figs. 11, 24). Lnvolucres : ^ superiors 2'4 mm., 

 very sharp ; c? inferior 0*8 mm., broad, rounded ; ? 2-3 mm., pointed. 

 Ovipositor very small, reaching to middle of 9 or a little beyond (Plate 9. 

 fig. 7). Colour. — Rich olive-green, beautifully mottled and marked with 

 numerous spots, band.=, and marks, the chief being as follows : — a ti-ans- 

 parent dark central dorsal band (under which the contractions of the 

 dorsal vessel are often quite visible), broken by pale basal segmental spots ; 

 two dark lateral bands consisting of segmental complete portions slightly 

 curved, with large dark reniform basal segmental blotches overlying them on 

 4-8, and smaller spots lying just internal and basal to them ; also a set 

 of small dark spots about the middle of 2-8, halfway between middle line 

 and lateral bands ; sometimes a durk sinuous line connects these spots up 

 longitudinally. 



Larval Types: ^ ?, Coll. Tillyard. (Sydney: c? bred Oct. 20th, 

 1907 ; ? bred Nov. 12tli, 1907.) 



Life-History. — Li most details the account given i'ov yEschiia brevi- 

 styla corresponds closely to the habits of this species. The following are 

 important differences : — 



The perfect insect is on the wing very early. I have a female taken on 



