iriJNTER: I'HE COCCID.E OK KANSAS. 
23 
is identical with tlie 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 
antenna; 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 
Lfcaniinn armeuiaciim the same variations as those mentioned.” 
1 he 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 antennae of ly bleached insects from plum 
by means of a |'j oil immersion objective, it was found that four 
of this number bore 7 jointeil antenna.', 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 antennae of representative insects will show these 
variations in detail. 
A brace is used to show that the two antennae 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 i. 
