308 L. R. CLEVELAND. 



EXPLANATION OF PLATE i. 



FIGS. 1-9. The Castes of Retictilitermes flavipes. 



FIG. i. Nymph of first form, with long wing pads, creamy white body from 

 1.3-1.4 mm. long, light brown eyes. 



FIG. 2. Side view of Fig. I. 



FIG. 3. Post adult first form queen, with enlarged abdomen, the scales of the 

 shed wings, body length varies from 7-14 mm. This figure X 5. 



FIG. 4. Nymph of second form, with short wing pads which never develop 

 into wings, colorless body and eyes. 



FIG. 5. Side view of Fig. 4. 



FIG. 6. Post adult of second form queen, with wing vestiges, enlarged abdomen, 

 body length varies from 7-12 mm. This figure X 5.5. 



Note: The third form caste which for lack of space is not shown, has no wing 

 vestiges, eyes cannot be seen except in stained material, is smaller having a body 

 in the post adult stage of 7-9 mm. 



FIG. 7. A group of workers enlarged three times. 



FIG. 8. A group of soldiers enlarged three times. 



FIG. 9. Mandibles of adult soldier which make the eating of wood impossible. 

 X 16. 



All figures (photographs) after Snyder. 



