n6 



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



types, the reproductive and the worker-soldier types, which 

 give rise, respectively, to the three adult reproductive castes and 

 the two adult sterile castes. The two types of newly hatched 

 nymphs are distinguishable by four structural characters: the 



s-w p 



O V -- 



V 1- - 



-JL- br 



FIG. i. Reticulitermes flavipes. Female nymph of the first form, drawn from a 

 whole mount. 



FIG. 2. Reticulilermes flavipes. Female nymph of the second form, drawn from 

 a whole mount. The ovaries, ov, which in their later development, are of secondary 

 size, are now more swollen than in the nymph of the first form, since the ova of the 

 second form nymphs mature at an earlier age. For the relative size of the ovaries 

 of mature queens of the first and second forms, compare Figs. 6 and 7. It should be 

 noted that all the parts of the reproductive system are fully formed and connected 

 in these two fertile nymphs. 



Br, brain; c.e, compound eye; c.gl, colleterial gland ;f.gl, frontal gland; l.w.p, long 

 wing pad; s.w.p, short wing pad; s. r, seminal receptacle; ov, ovary. Oc. 6, obj. 32 

 mm., drawn at stage level. Reduced one third. Drawn by C. B. T. 



