THE VICTORIAN NATURALIST. 



13 



more oblong form of both the test and the adult female, and 

 in the size and shape of the marginal spines. It affects also 

 quite a different order of plants. 



This is the first species of Eriochiton recorded from Australia. 

 Two species occur in New Zealand. 



Sub-family Coccin^e. 



Dactylopius australiensis, Green and Lidgett, n. sp. 



Judged by the antennal formula only, it might be assigned to 

 Dactylopius globosus, Mask., which also affects various species 

 of Acacia, but other general characters show it to be quite 

 distinct. The test of globosus is very much larger, firmer, and 

 more compact than that of the present species. There is a very 

 marked difference in the proportionate size of the legs in the 

 two species. While the adult female of globosus is more than 

 twice as large, its legs are much smaller than those of the insect 

 now under consideration. 



3 



D 



Fig. 4. — Antennas of Dactylopius australieitsis, Green and Lidgett. 

 (Much enlarged.) 



There is a considerable variety in the antennal formula. The 

 normal number of joints seems to be 8, though in a large per- 

 centage of the specimens joints 4 and 5 are confluent, the 

 divisions being incomplete and sometimes even altogether 

 absent. In some examples the joints are distinct in one antenna 

 and fused in the other. The terminal (8th) joint also shows a 



