162 A7indls Entomological Society of America [Vol. X, 



Plate XV. 



Xylococcus quercus Ehrh. 



Leg of first larval stage. 



Body pores of apodous stages of female. 



Antenna of adult female. 



Leg of adult female. 



Body pores of adult female. 



Antenna of fourth stage male. 



Leg of fourth stage male. 



Body pore of fourth and fifth stages of male. 



Antenna of pupa of male. 



Leg of pupa of male. 



Xylococcus alni n. sp. 



Antenna of first larval stage; e, eye. 



Leg of first larval stage. 



Posterior segments of abdomen of first larval stage, showing spines, 



pores, anal tube, and stigmatal tubes; a dorsal; b, ventral. 

 Anal tube of fourth stage of female; a, alimentary canal; b, anterior 



spinnerets; c, median spinnerets; dd, posterior stigmatal tubes. 

 Body pores of apodous stages of female. 

 Antenna of adult female. 

 Leg of adult female. • 



Body pores of adult female. 



