10 



SCALE INSECTS OF SANTA CRUZ PENINSULA 



Eriococcus araucariae Maskell. 



Fig. 3. 



1915. Eriococcus araucariae Maskell; Essig, "Injurious and Beneficial Insects of 

 California," ed. 2, p. 120, fig. 102. 



This is an introduced species found only on Araucaria, It probably 

 is generally distributed within this area wherever its host is grown, but 

 I have seen specimens only from Menlo Park. 



Essig (ref. cited) has given an excellent photograph of the sac, and 

 I append herewith a description of the morphological characters of the 

 species. 



Fig. 3. Eriococcus araucaria (Maskell) : A, antenna of adult female; B, anal lobes, 

 dorsal aspect left, ventral aspect right ; C, types of spines, the smallest repre- 

 senting those of the dorsum ; D, wax duct. From specimen from Santa Cruz 

 Peninsula. 



Adult female with the marginal spines greatly exceeding in size those 

 of the dorsum (Fig. 3C), the latter being quite numerous but very small, 

 cylindrical and truncate at the tip, the former being straight, slightly ex- 

 panded at the base a~nd then tapering evenly to the tip, which is bluntly 

 rounded or even truncate. The marginal spines are arranged in a definite 

 single row, each abdominal segment bearing three spines at each lateral 

 margin, one of these spines being considerably smaller than the other 

 two. Anal lobes (Fig. 35) heavily chitinized, rather cylindrical in form, 

 each bearing upon the dorsum three spines of about the size of the smaller 

 marginal spines and upon the ventral side a pair of slender setse. Anal 

 lobe setse somewhat longer than the anal ring setae. Antennas (Fig. 3A~) 



