( 12 ) 



secured it by passing a long fine rod of twisted paper 

 just moistened at the tip with chloroform beneath it ; 

 this stupefied but did not quite kill it, so that I could 

 observe it with very slight disturbance from movements 

 of the insect. 



About three hours after being first noticed the abdo- 

 men, as seen with a 1-inch power, was of various tints 

 of a yellow-brown colour.* The following morning, on 

 investigation of details, the thorax was black above, 

 yellow or pale yellowish brown beneath the root of the 

 wing, and with another patch of the same colour in 

 front, that is to say, a patch about half-way down on 

 each side of the prothorax. The six segments of the 

 abdomen nearest the thorax of a raspberry colour, paler 

 below, with a broad black transverse band extending 

 over the back and half-way down the side of each 

 segment, which was also marked with a well-defined 

 black velvety patch on each side. The terminal segments 

 of the abdomen and the extended ovipositor were of 

 nearly the same shade of yellow, or pale yellowish brown 

 as the patches on the side of the fore body, and the ovi- 

 positor was not furnished with lamellulae at the extremity. 

 The 7th and part of the 8th segments were marked 

 above with a small V-shaped figure with a fine line on 

 each side, parallel to the sides of the V, the lowest end 

 of the V pointing backwards. This figure was only 

 noticeable when the abdomen was seen from above, and 

 was not of deep tint. 



The halteres or poisers were of a bluntly-pointed 

 club-shape at the extremity, and yellow with a sprinkling 

 of hairs, which in some lights gave a blackish tint to the 

 upper part and also to the base of the club, and at this 

 stage there was a marking of raspberry-red just about 

 the middle of the poisers. The body and abdomen were 

 in parts very hairy, and the black velvety patches on 

 the sides of the abdomen appeared to be composed of 



* For fuller descriptions than I can give from my own observations of 

 the early changes of colour the reader is referred to Dr. Wagner's paper 

 previously referred to. 



