Rev. F. D. Morice's Notes on Australian Sawflies. 283 



6. Scutellum bisected longitudinally by a deep and wide sulcation. 



Fore-wing with a conspicuous * patch of scale-like hairs 

 (situated on the underside of the wing, but visible through it 

 from above) which occupies part of the radial and cubital 



areas (PL XI, Fig. 5) 7. 



— ■ Scutellum not deeply sulcate -at most with a slight central 

 impression. Fore-wing with no conspicuous aggregation of 

 hairs, as described above, though several species when 

 carefully examined seem to possess the character to a certain 

 extent, while others lack it entirely 8. 



7. The fore-wing only with a pilose patch as above described. 



General colour of the insect testaceous brown, hut thi 



tellum distinctly yellow polita, Leach. 



— Hind-wing with a pilose patch like that of the fore-wing hut much 

 smaller. General coloration of insect darker, scutellum not 

 yellow but brown like the rest of the dorsal surface. 

 castanea, W. F. Kirby = divaricata, W. F. Kirby. ?, nee $ ! f 



Type of divaricata in B.M. 



8. Two basal joints of antennae black, the rest testaceous. Ab- 



domen black above, sulphur-yellow beneath. Scutellum 

 testaceous (not yellow) with a more or less conspicuous 



central sulcation antiopa, n. sp. 



All joints of antennae duteous (none black !) Dorsum of abdomen 

 never black. (Scutellum may be yellow, or may differ from 

 that of antiopa in its sculpture) it. 



* Visible to the naked eye ! it is very desirable that these hairs 

 should be examined in living specimens. They much resemble 

 the so-called androconia of some ] Lepidoptera, and 1 venture to 

 suggest that they may have a similar function. This point cannot 

 be investigated to any purpose in old dried specimens. " Aus- 

 tralian Entomologists, please note ! " So far as 1 know, the exist- 

 ence of scent-scales in the wings has never yet been suspected in 

 any Hymenopteron, though it is well known that certain ] Bees 

 have a peculiar fragrance [Psifhyrus, etc.). 



t The ; and described together by W. F. Kirby (Ann. and V>"j. 

 .V. //., 1893, p. 39) a- thesexesof a new species "divaricata " cannot 

 possibly lie conspecific, their neuration showing that they belong 

 to different groups. Divaricata ] I take to be almost demonstrably 

 the o of castanea previously described from only by the same 

 author; and divaricata is in my opinion a specimen of bella it 

 certainly belongs to the bella group, as shown both by it> neuration 

 and its saw-characters ! 



Kirby il.r.) says he was "at first inclined to refer these specimens 

 to P. castanea, Kirb." lb- did not do so because "in that species 

 the scutellum is much less thickly punctured." 



