346 CLAUDE FULLER. 



fifteen minutes, liad only reached a depth between 1 and 

 1^ in. in two houi's, and 4 in. in eighteen hours. ^ 



On October 28th, 1918, a pair of T. in cert us burrowed 

 into the soil of a glass jar. They did not go to the bottom 

 but to a depth of 5 in. The jar was left undisturbed until 

 December 30th, when the soil was carefully removed and 

 portion of the cavity they were occupying exposed. Both 

 insects were then quite healthy and were surrounded by a 

 brood of callows which they had obviously reared themselves. 

 The cavity was closed and the jar refilled. They were not 

 again disturbed until the middle of Februaiy, when, during 

 the absence of the writer for a fortnight, too much moisture 

 was added to the jar and the colony succumbed. 



In November, 1914, attempts were again made to keep this 

 species under observation in glass cells. At first, the insects 

 took kindly to their artificial environment, and several pairs 

 placed in the cells on November 5th had laid five to seven 

 eggs on December 2nd and then succumbed ; the dead bodies 

 being covered with mould-growth which appeai-ed to be rather 

 of a parasitic nature than to be due to excess of moisture or 

 other adverse conditions. 



A few pairs remained alive in artificial cells, i. e. glass 

 tubes plugged with earth ; their eggs had not hatched on 

 Januaiy 11th, 1915. All died early in February. 



Eutermes bilobatus Haviland and an undetermined 

 species. — The undetermined species is an insect which is 

 related to Eutermes bilobatus but is not known to build a 

 superticial mound. Structurally the soldiers of the two species 

 are quite distinct ; but for convenience the mating of the 

 images of both species may be dealt with together. The 

 Haviland notes (1) contain a good description of the mating of 

 bilobatus, although it is curious that neither in the description 

 of this species nor in that of its mating does Haviland remark 

 upon the great disparity in size, as between male and female. 



' The observations were made with couples placed in naiTow vertical 

 glass jars of moist soil. 



