BRAIN OF THE WHITE ANT 559 



The egg-laying true queen. The old egg-laying true queens 

 are always found within the nest, often in large 'queen cells' or 

 chambers, and they may attain a length of 14.5 mm., Snyder 

 ('16). The head and thorax are of normal size and brown in 

 color, the abdomen is enormously distended, and is straw-colored 

 with intersegmental bars of brown. The broken off stubs of the 

 long wings remain attached to the thorax. 



The neoteinic substitute pair with short wing pads. This pair 

 is found within the nest and is similar in length to the nymphs 

 of the second form. The body color is light bro\viiish and the 

 'compound eyes are browTi. The wing pads are now merely short, 

 transparent chitinous plates. 



The egg-laying substitute queen with short wing pads. This 

 old substitute queen with short wing pads attains a length of 9 

 mm., Snyder ('16). The abdomen is distended and is creamy 

 white with darker chitinous bars, the head and thorax are of 

 noimal size. The compound eyes are brown. ^ 



The neoteinic substitute wingless pair. As I have never seen 

 this form, I will again quote from Snyder ('16, p. 7), "Of a pale 

 yellowish or grayish color, and having no wing pads (fig. 3; fig. 

 4c), individuals of this larval supplementary reproductive form 

 are apparently blind and never leave the parent colony, except 

 by underground tunnels." 



The egg-laying substitute wingless queen. The old egg-lay- 

 ing substitute wingless queen attains a length of 9 mm. and has 

 a distended abdomen, Snyder ('16). 



Forms with sex organs not developed in the adidt. 1. The work- 

 ers. Workers are found in termite colonies tlu'oughout the year. 

 The smallest of all the castes, the body measures only 5 mm. in 

 length. The head is considerably broader from side to side 

 than that of the nymphs. The abdomen is shorter, softer, and 

 covered with a more transparent skin. The color of the abdo- 

 men is usually grayish, owing to particles of wood in the ali- 

 mentary canal seen through the skin. No eyes are visible in 



^ The above descriptions of the enlarged egg-laying queens are based upon 

 the alcoholic specimens sent to me by Mr. A. D. Hopkins and Mr. T. E. Si.yder 

 of the U. S. Dept. of Agriculture. 



THE JOURNAL OF COMP.VRATIVE NEUROLOGY, VOL. 26, NO. 5 



