Colenso. — On newly-discovered New Zealand Insects. 151 



have never once succeeded ; it seems to be entirely dependent on itself 

 (possibly emotional), and not arising from any outward cause — nor from 

 the time of day ; neither is it regular in its changes. At first, I was a little 

 astonished, and could scarcely believe my own eyes, until I had repeatedly 

 proved the event ; the change of colour is always equally the same, extend- 

 ing all over its body. 



This lizard is also infested with a tiny red parasite, that sticks on 

 between its scales in the outer angles of the thighs of its hindlegs, where it 

 lives together in little clusters of 12-16. This parasite has a thickish body, 

 rather soft, and is very difficult to remove entire. I suppose it to be an 

 insect of the Hemiptera order. I have sent specimens of it to Professor 

 Hutton at Christchurch, and to Mr. Maskell at the Museum, Wellington, 

 for examination, etc. 



Art. XV. — A Description of some newly-discovered New Zealand Insects 



believed to be new to Science. By W. Colenso, F.L.S. 



[Read before the Wellington Philosophical Society, 1st October, 1884.] 



INSECTA. 



Order OETHOPTEEA. 



Section Gressoria. 



Family PhaomidjE. 



Division Apterophasmin^e. 



Genus Bacillus. 



1. Bacillus coloreus, sp. nov. 



Female ; General colour light green ; the two basal joints of antennas 

 (under- surface), the throat, and the upper long curved ends of anterior 

 femora bright pink-red. 



Head oblong, rather narrow, 8-9 short scattered muricated points on 

 vertex ; occiput broad, width of prothorax ; maxillary palpi finely pubescent ; 

 antennas 12 lines long, very slender, cylindrical, pubescent, composed of 22 

 joints, articulations pink-red, the basal joint large broad and flattish and 

 green on the upper surface, the second basal very small, the rest large, 

 brownish-green with a pink tinge, increasing in size to apex. 



Body mostly smooth, 3|- inches long, stout, increasing in size to 3rd 

 abdominal segment where it is 3-J lines wide, a narrow slightly-winged 

 crease or fold with a light-yellow margin extending downwards from 

 anterior legs, giving the appearance of double side margins to the abdomen, 

 which is 19 lines long ; a small triangular central dark-brown spot at 

 occiput, another at lower end of pronotum, with a very narrow dark line 



