hunter: the COCCID.T. OF KANSAS. 73 



is identical with the above species. With regard to the difference 

 in length of one or the other of the antennal joints, as noticed, I 

 will say that it is simply individual variation; even in the same 

 specimen the comparative length of either of the joints of both 

 antennae varies frequently more or less. There is generally also a 

 more or less perceptible-variation in size, color and shape in the 

 same species, dependent, in a measure, on the food plant on which 

 it may have established itself, and also on the locality. Old speci- 

 mens, which have attained their full growth and have died a natural 

 death, are generally darker, if prepared for the microscope, than 

 younger individuals of the same stage and with all the pores of the 

 germ much more distinct. As to the, shape of the individual scales 

 and their sculpturing, I find in our material of typical specimens of 

 Lccauiiini ai-niciiiacuiu the same variations as those mentioned." 



The limitation of variations within a species never fails to be of 

 interest. With a view to setting these forth in this species the 

 following data are given concerning the antennae: 



After examining the antenna? of ig bleached insects from plum 

 by means of a ,'o oil immersion objective, it was found that four 

 of this number bore 7 jointed antenuce, two showed faint trace of 

 suture between 3 and 4 (of the 7 jointed variety) and thirteen bore 

 distinctly 6 segmented antennae, 3 and 4 appearing as one and 

 about equal in length to 3-(-4 of the 7 segmented antennae. Meas- 

 urements of antennai of representative insects will show these 

 variations in detail. 



A brace is used to show that the two antenna? belong to the same 

 insect. In this connection it is well to note the variations in num- 

 ber of segments within the individual as shown in the cases of 

 / and /. 



