BY R. J. TILLYARD. 355 



9. Coll. Hagen(Fiji). Hab. — Fiji Islands, and probably other 

 Pacific islands lying off the coast of Australia. 



B. S. macrostigma orientcdis, n.subsp. — Described above. It 

 ■differs from A in the following points — Black mark at base of 

 wings very small in both sexes, lying in subcostal space. Wings 

 of female hyaline, ivithout any suffusion, even in newly emerged 

 specimens. (I have bred out several females, all with hyaline 

 wings). Front with a veiy inconspicuous T-mark; face and 

 labrum darker. Appendages of male dark brown, but dorsum 

 of segment 10 partly pale. Ovipositor of female never reaching 

 to end of 10, generally scarcely upcurved at tip. Type-series : 

 ^9. Coll. Tillyard(Blue Mountains, N.S.W.). Hab.—l^ew South 

 Wales, Victoria, South Australia, and Tasmania. Found on 

 mountain-swamps; distribution local. 



C. S. macrostigtna occidentalis, n.subsp. — Remarkable for the 

 small size of the male, hindwing only 28 mm.; female as large as 

 in A and B. Wings of male hyaline, with a conspicuous dark 

 brown basal spot reaching out 2-2-5 mm. along subcostal space. 

 Female with wings suffused tvith yelloioish-broion, costa pale 

 yellow, dark basal marks reaching 3 "5 mm. in fore- and 6 mm. in 

 hindwing, along subcostal space. Front with a fairly conspicuous 

 brown T-mark, but face and labrum very pale. Dorsum of 9-10 

 and basal three-fourths 0/ appendages of male very pale. Ovi- 

 positor of female reaching just to end of 10, usually with a blunt 

 upcurved tip, similar to that of S. leachii in Plate vii., fig 18. 

 Type-series : Coll. Tillyard (Bridgetown, Western Australia). 

 Hab. — South-western Australia; very rare. Occurs on swampy 

 creeks. The variability of the ovipositor of this species is a 

 strong argument against the use of that organ for generic dis- 

 tinctions in the group, and serves to support my belief that the 

 ovipositor', where still remaining, is essentially a variable organ 

 in process of reduction from having lost its original use as a 

 terebra. 



L i f e - h i s t o r y oi S. m a c r s t i g in a oriental i s, n. subsp. 



The perfect insect emerges in November, and continues on the 

 wing until February. Immediately the wings are strong enough. 



