12 president's address. 



Ml'. Halliiianii gives up his Fellowship to engage in other work. 

 We wish him all success in his new sphere. 



Mr. K. J. Tillyard, Linnean Macleay Fellow in Zoology, con- 

 tributed eleven papers during the Session, of which seven have 

 already appeared in Parts i.-iii. of the Proceedings for 1917; two 

 others will be found in the forthcoming Part iv. of the same 

 volume: and the remaining two will be read at an early Meeting. 

 Three of these papers dealt with the Odonata, four with fossil 

 insects, one each with the Orders Jvepidoi)te]'a, Planipennia, and 

 Mecoptera respectively, and one with the neuropteroid fauna 

 of Lord Howe and Norfolk Islands. The researches upon 

 the breathing-apparatus of the larva* of Odonata were com- 

 pleted ; the work begun upon Australian fossil insects made 

 considerable progress ; and a start was made with the study 

 of other neglected Orders. A considerable amount of work was 

 carried on in the investigation of the Orders comprising the 

 "Panorpid Complex," namely, the Mecoptera, Planipennia, 

 Megaloptera, Trichoptera, Lepidoptera, and Diptera, with a 

 \iew to the elucidation of their phylogeny, and inter-relation- 

 ships. In making a careful study of the Jugate Lepidoptera, 

 in this connection, ISh: Tillyard recently made the important 

 discovery, that five genera of the Family Micropterygida' have a 

 wing-coupling apparatus not of the jugate type found in llejna- 

 Hdce, as has hitherto been supposed, but of a more primitive, 

 jugo-frenate type, closely resembling that found in the Plani- 

 pennia and Mecoptera. On the hindwing, near the base of the 

 costa, there is a strongly developed frenulum of from two to six 

 l)ristles, which becomes engaged, during Hight, in the sinus 

 formed between the base of the dorsum of the forewing and the 

 so-called jugum; this latter is bent under the forewing, with its 

 apex pointing outwards and forwards, and acts as a retinaculum 

 for the frenulum, and not in any way as a jugum or "yoke" for 

 the costa of the hindwing, as it does in Ilepia/ida. 



Dr. H. S. Halcro Wardlaw, Linnean Macleay Fellow in Physi- 

 ology, completed the first part of an elaborate study of the 

 variability of cows' milk, which will appear in the forthcoming- 

 Part of last year's Proceedings. This dealt with the variations 



