BY R. J. TILLYARD. 485 



that I was led to give it a new name; and it was not until I 

 received an abundant supply from Mr. E. Allen that I was able 

 to connect the two forms by intermediate specimens. At Cairns 

 this species appears at the end of July, and in August the brown 

 form swarms. At the end of that month the males begin to 

 assume the bluish bloom, and throughout September they are 

 still common. From then up to December the species rapidly 

 decreases in number, and in January-February only a few tattered 

 individuals are left. The old females which are left over to the 

 ■end of the season are, like the males, almost entirely covered with 

 bluish bloom. 



7. Diplacodes nebulosa Fabr. 



This pretty little species is common in the East Indies. It 

 may be easily recognised by its diminutive size, and by the 

 fuscous tips to all four wings. In Australia, I took seven males 

 flying over the Carrington Marsh, near Atherton, N.Q., in Jan- 

 uary, 1905. It flies about ten yards out from the edge of the 

 swamp and keeps very close to the surface of the water. It can 

 only be captured by wading. The motion of the wings is so 

 quick that it is exceedingly difficult to see this insect when flying, 

 though its actual progress is slow and very zigzag. It is fond 

 of sitting on the very tips of grass and reed-stems sticking out of 

 the water, with its wings depressed. I do not know the female. 



8. Agrionoptera insignis Ramb.(?). 



During the months of February- April, 1905, Mr. E. Allen of 

 Cairns, forwarded me a number of exceedingly beautiful dragon- 

 flies referable to the genus Agrionoptera. I forwarded a number 

 of these to M. Hene Martin, who is of opinion that they are 

 " probably insignis." A. insignis is a Javan insect. No species 

 of this genus has ever been recorded for Australia. As there 

 appears to be a possibility that this is a new species, and as no 

 description of A. insignis is accessible to Australian collectors, I 

 propose to give a careful description of my species and thus put 

 it permanently on record; when it is to be hoped that any 

 collector possessing specimens of A. insignis will at once compare 

 his insects with this published description. 



