8U 



Mil. J. G.'ll. FREW ON' THK LAllVAL 



Balioptera COMBINATA L. 



The full-grown larva (text-fig. 19) is shorter and relatively- 

 thicker than that of Chlorops. Its cephalo-pharyngeal skeleton 

 is proportionately larger than in any other larva considered here. 



Text-figure 19. 



a-sp. 



psp. 



Halioptera cowhinata. Lntenil view of inaturo larva. 



Its most prominent charactei'istics are its large anterior stigmata 

 and the heavily chitinized median ventral piece of its cephalo- 

 pharyngeal skeleton. 



The Head (text-fig. 20) is chiefly remarkable for the arrange- 

 ment of the numerous chitinous rid":es on its ventral sui-face» 



Text-fio-ure 20. 



0-2 mm. 



It. comhlnata. Vuntral view of larval lieail. (The rows of chitinous denticles 

 on the protliorttx have been omitted.) 



which is divided by them into small polygonal areas whose distri- 

 bution is shown in the figure. Certain of the ridges in the 

 region antero-lateral to the mouth-opening bear small chitinous 

 teeth (c. r. t.) pointing posteriorly. 



