HANCOCK 3 1 



The reaction of the environment on the little Tettigids from 

 now on is interesting to observe. During a time extending 

 from a few minutes to a half hour after emerging, the pale 

 white larvjE undergo pigmentation and are soon lost from 

 view, the most careful scrutiny becoming necessary to detect 

 them now on the ground. 



SIZE OF TETTIGIDS LARV^. 



As the eggs would indicate, the young of Tettigidca, when 

 first born, are considerably larger than Tettix or Paratettix, 

 and are quite easily distinguished even at this early period. 

 In Tettigidca parvipefinis, just before the first ecdysis or the 

 first larval stage, the body is quite slender; the pronotum 

 about twice the length of the head. After the first ecdysis 

 or during the second larval stage, the body becomes more 

 compact or stouter, the pronotum becoming proportionately 

 larger, more strongly carinate and arcuate, and then an apical 

 process lengthens out, covering nearly half the abdomen. In 

 the first stage there are ten joints in the antennae, the joints 

 being divided by a whitish line, but in the second stage the 

 third and fourth antennal articles become distinctly divided, 

 increasing the number to eleven. 



PRONOTAL CHANGES. 



As each molt proceeds, the pronotum, which in the begin- 

 ning only just covers the metanotum, gradually develops, and 

 during the last or fourth molt reaches its maximum size and 

 the antennae then consist of the full complement of twenty-two 

 articles. 



APPEARANCE OF THE ELYTRA. 



It is after the fourth, or rarely the fifth, ecdysis that the 

 elytra, which have not heretofore been visible, take their 

 position at the sides of the body, and the wings extend back- 

 ward and longitudinally folded under the now fully developed 

 pronotal process. The adult can thenceforth be distinguished 

 from the larva. 



