316 



Annals Entomological Society of America [Vol. IV, 



Agrifoliae Essig. No formula is given in the description. 

 The description refers however to the figures of the antennae 

 for the relative length of the segments. Measuring the figure, 

 the following formula is constructed, 7, 1, 3, 2, 4, 6, 5. The 

 figure is evidently taken from a nymph, as this species has nor- 

 mally eight segmented antennae. These specimens were all 

 taken from a single oak tree (Quercus agrifoliae) at Santa 

 Paula, California, and are from the lot of specimens that the 

 type of the species was taken. In two specimens the for- 

 mulae of the right and left antennae were found to be the same 

 although the formula of each specimen is different. The for- 

 mulae of the twenty antennae varied as much as the specific- 

 ally diagnostic formulae published for the species of Pseudo- 

 coccus. 



