WHEELER— ANT LARV^. 



311 



preparation, shows the nervous system and aHmentary canal. The 

 Malphigian vessels have only just begun to develop at the blind end 

 of the proctenteron where it abuts on the posterior end of the large, 

 elliptical mesenteron, or stomach, but no salivary glands can be de- 

 tected. 



In the second stage larva (Fig. iiA) the body is more elongate 

 and cylindrical and the four pairs of appendages can still be recog- 



FiG. II. A, second, B, third and C, fourth (adult) larval stages of Pachysima 



latifrons Emery. 



nized though considerably smaller in proportion to the remainder 

 of the body. The mandibles are becoming chitinized. Many of 

 the long hairs on the dorsal surface are still present but a general 

 covering of short, sparse hairs has made its appearance. 



The third stage larva (Fig. iiB) is larger and still more elongate 



