BY U. J. TILLYARD, 401 



alidonieii, the pale colon latioii consists of a fairly regular dorsal 

 band, pale transverse basal lines on each segment, and a series of 

 slanting semi-oval marks on each side of segments 4-8. For 

 general appearance of this nymph, see Plate xi., fig. 1(6'. montana), 

 the chief difference InMiig that, in C. montidid the forelegs are 

 much longer by comi>arison, for the size of the nymph. 



The most beautifully marked nymphs aie those which occur in 

 the clear mountain-creeks, such as the creeks at Heathcote and 

 Lilv Vale, in the Illawarra district. In the more muddy creeks, 

 such as Duck Creek, Auburn, the pattern of the nymphs is 

 generally much less pronounced. 



The habits of this nymph are very similar to those of the 

 nymphs of HcruicordnHa. Tt lives on the sandy bottom of the 

 creek, lying hidden in the sheltered corners away from the main 

 current of water. It never burrows nor buries itself in the sand; 

 but relies for capturing its prey on its pr-otective colouration — 

 which suits its habitat i-einarkably well, — on its hmg and agile 

 legs, and on its powerful labium. I have fed them on mosquito- 

 larva;, water-lieas, and small Agrionid nym]>lis, all of which they 

 devour greedily. They can, however, go without food for fairly 

 long periods, though T do not think that they can withstand any 

 degree of drought. 



When emerging, the nymph crawls up the bank of the creek, 

 often very steep, or even ovei'hanging, and then ascends the grass 

 or i-eed-stems near by, often travelling a foot or more up the 

 stem. Tn the aquarium, they find it very difficult to ascend a 

 single reed-stem, but climb up moscpiito-netting quite easily. 



The imago, when newly emerged, has a very peculiar coloura- 

 tion, the eye.s, pterostigma, and thorax being a kind of livid-grey. 

 This colouration persists foi- some days, so that one can tell from 

 it whether the insect is immature or not. The innnatui-e insects 

 tly away into the bush, generally settling high upon the branches 

 or trunks of trees, with theii' wings folded. The habits of the 

 mature imago are very peculiar. It seldom fiies for long at a 

 time, and may usually be found settled upon a rock in the stream- 

 bed, or on the trunk of a neighbouring tree, with its wings 

 folded close along its back, just like an Agrionid. On a wann 



