CASTES OF TERMOPSIS 



501 



October. The body color of the mature nyniphs (fig. 1) is creamy 

 white, except for two dark areas at the base of the clypeus and at 

 the tips of the mandibles. The head has ahnost the typical adult 

 form, broadest behind the eyes, and tapering forward to the 



Fig. 1 Termopsis angusticollis. a, mature nymphs of the first form, with 

 thick wing pads, wp., surface view; b, immature nymph of the first form, with 

 thin wing pads, wp., Spencer oc. 6, obj . 32 mm., stage level, reduced one-half. 



clypeus. A depressed area on the frontal surface marks the 

 position of the 'frontal gland,' but no external opening, or fontanel, 

 is visible. The large compound eyes are dark brown and shghtly 

 reniform (fig. 2, a). Twenty-five and twenty-six antennal 

 segments have been observed. The wing pads are thick and 



