PROC. ENT. SOC. WASH., VOL. 22, XO. 6, JUNE, 1920 IIJ 



later, after the underground life has begun, ci'cn this caste may 

 lose some of its pigment. Species of Reticulitermes abandon their 

 galleries in wood above ground during winter and periods of 

 drought and retreat to subterranean tunnels. 



The compound eyes and the ocelli are large and well developed 

 in all the castes of P. simplex, a species which lives in dead tree 

 trunks or logs, is not subterranean, and hence is more exposed to 

 light in its habitat, so that there seems to be a correlation between 

 the high state of development of the eyes and the habitat of these 

 insects. 



In the subterranean species of Reticulitermes there are evidences 

 of loss of pigment and the structural elements of the eyes in all 

 castes except the winged insects. 



A more thorough and detailed morphological comparison of 

 these three types is to be found in another paper, (Thompson and 

 Snyder, 1920). 



"Intermediate" Reproductive Forms. 



As previously stated, (Thompson and Snyder, 1919), up to the 

 present time rather few "intermediate" reproductive forms have 

 been described. The reason for this may be either that they 

 have been overlooked thus far, or that they do not exist. The 

 intermediate forms known at present are as follows: 



The Rev. F. L. Odenbach, S. ]., of Cleveland, Ohio, has reared 

 artificial colonies of termites for over 20 years. He has kept 

 manuscript notes on the forms in the colonies which he has kindly 

 turned over to me. "In one of Odenbach's artificial colonies of 

 Reticulitermes flavipes, an enlarged egg-laying queen, figured in 

 manuscript notes and referred to by Snyder (1915, p. 56) has the 

 abdomen distended and the abdominal tergites separated, but 

 possesses long, well-developed wing-pads like a nymph of the 

 first form," (Thompson and Snyder, 1919). The abdomen was 

 distended and the abdominal tergites were separated. This 

 queen laid eggs; she was quite different in shape and color from 

 the normal second form queens. She was slow in her move- 

 ments and did not change her location in the colony very often; 

 she was tended by the workers. 



"Grassi (1893) has figured a queen which, in respect to the 

 length of the wing-pads, is an intermediate between the first 

 and second forms in the species R. Im-ifugits Rossi," (Thompson 

 and Snyder, 1919). 



vSimilar intermediate reproductive forms have been found in 

 colonies of species of Reticulitermes in the United States. 



In species of Tennopsis there are a larger series of intermediates 

 between the apterous third form and the normal second form 



