I2O 



C. B. THOMPSON AND T. E. SNYDER. 



Reproductive castes. 



The field of termite morphology needs much revision, but a 

 few significant facts may be stated here. 



TABLE I. 



THE CASTES OF Reticulitermes flavipes KOL. 



1. Adults of the first form Long wings, or stubs 



after deflation; brain, 

 compound eyes, and 

 frontal gland large; ma- 

 ture sex organs larg- 

 est of any caste; abun- 

 dant pigment in skin. 

 Aerial habit of swarm- 

 ing. 



2. Adults of the second form.. .Short wing pads; brain, 



compound eyes, and 

 frontal gland smaller; 

 mature sex organs 

 slightly smaller; less 

 pigment. Subterranean 

 mode of life. 



3. Adults of the third form Entirely wingless; brain 



small, compound eyes, 

 and frontal gland ves- 

 tigial; mature sex organs 

 much smaller; still less 

 pigment. Subterranean 

 mode of life. 



4. Workers Wingless; brain small, 



compound eyes and 

 frontal gland vestigial; 

 sex organs embryonic; 

 no pigment in body. 

 Subterranean mode of 

 life. Head broader 

 than in the first and 

 second reproductive 

 forms, stouter mandib- 

 ular muscles. 



5. Soldiers Wingless; brain very 



small, compound eyes 

 vestigial, frontal gland 

 large; sex organs em- 

 bryonic, even smaller 

 than in the worker; no 

 pigment in body. Sub- 

 terranean mode of life. 

 Elongate head, long 

 mandibles, massive 

 mandibular muscles. 



Sterile castes. 



