NEW SPECIES OF DIASPINE SCALE INSECTS. 19 



approxiDiating the color of the scales of the other specimens. Para- 

 o;enitals : 



















0-0 (two specimens). 





2-1 



1-0 



0-] (three specimens) 



0-0 





2-1 



0-0 



0-0 



















1-1 



1-0 





1-1 (two 



specimens). 



1-0 



1-3 





1-1 





(4) On fig, Bloemfontein, November 29, 1907: Substantially typ- 

 ical, one specimen out of six exhibiting two paragenital glands, 

 namely, one each of posterior laterals; with the other five specimens 

 no glands present. Mounted material only. 



(5) On privet, Bloemfontein, October, 1907: Tj^pical, except for 

 the presence of scattering paragenitals as follows: 











1-2 



.3-3 



1-1 



2-2 



Slide mount onl}^, showing two females. 



All of this material evidently belongs to the same species. The 

 five lots originally studied show practically no paragenital glands, 

 also general uniformity in dorsal pores, except in the case of speci- 

 mens on pepper tree. 



In all the later material received from Mr. Lounsbury scattering 

 paragenital glands are found in most of the individuals examined. 

 The specimens on fig from Cape Colony and Bloemfontein show a 

 general absence of these glands, or, if present, represented mostly by 

 single glands. In the case of the other food plants, both from Cape 

 Colony and from Bloemfontein, the paragenitals are very scattering, 

 with one or more groups often entirely wanting. Taking the reason- 

 able supposition that all this material represents the same species — 

 and there seems to be no occasion to doubt this judgment — we have 

 evidently a case of a species either in a transition stage, in the matter 

 of the presence or absence of paragenitals, or slightly variable in this 

 feature. The paragenital glands are developed only in the adult 

 stage of the female, and it has long been the belief of the writer that 

 they can not be given very much specific importance. They are 

 always subject to considerable variation, and future studies may 

 prove that, in certain instances where species have been separated 

 chiefly on the presence or absence of these glands, the separation is 

 not justified, as possibly illustrated in the case of latanise and camellise. 

 In the matter of dorsal pores, the specimens on Kieffer pear. Cape 

 Colony, show a rather unusual development, and the pygidium in the 

 examples studied is rather more produced or triangular; otherwise 

 the agreement is close. Some slight variation in the number of dor- 



