394 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XX I L 



Cerococcus ehrhorni Ckll. 



First larval stage of female; a, double pits. 



Leg of first larval stage of female. 



Antenna of first larval stage of female. 



Second stage of female; a, antenna; b, spiracle. 



Adult female; a, antenna; b, spiracle; c^ mouth-parts; d, fungus 



filaments. 

 Antenna of adult female. 

 Spiracle of adult female. 

 Fungus filaments. 

 Mouth-parts of adult female. 



Cerococcus quercus Comst. 



First larval stage of female. 



Caudal segment of first larval stage of female; a, double pits. 

 Leg of first larval stage of female. 

 Antenna of first larval stage of female. 



Intermediate stage of female; a, antenna; b, mouth-parts; c, spir- 

 acle; d, tracheal tube. 

 Fig. 15. Mouth-parts of intermediate stage of female. 



