122 ASPIDIOTUS HEDER^. 



genital glands ; the anterior laterals of from 8 1 3 ; 

 and the posterior laterals from 5 10. The groups are 

 well separated; but sometimes an odd gland or two 

 may be found isolated from the rest. Vaginal open- 

 ing near the centre of the grouped glands. Anal 

 opening considerably below them. Subdorsal groups 

 of tubular spinnerets short, cylindrical ; connecting 

 pores, widely divergent, form a broad irregular band, 

 extending the entire length of the pygidium. There 

 are also a series of about seven, short, cylindric, tu- 

 bular spinnerets on either side of the median lobes ; 

 another of the same structure arising between them ; 

 and immediately outside each a singular spinneret 

 very much attenuated posteriorly. Margin of pygi- 

 dium (PI. XII, fig. 3) with three pairs of lobes; the 

 median pair are well developed, rather widely sepa- 

 rated, have the inner lateral margins slightly curved, 

 entire, or faintly notched ; the second and third pairs 

 very variable. Usually the former are well developed, 

 rectangular and entire, or notched on the outer lateral 

 margin ; the third pair similar in structure, but much 

 smaller, and often rudimentary. The variation in the 

 lobes is probably due to the age of the insects. The 

 spines are very long, but being semi-erect do not 

 usually appear so. The first is placed at the base of 

 the outer margin of the median lobes ; the four next 

 are arranged in pairs, one dorsal and one ventral, op- 

 posite the second and third lobes ; the sixth opposite 

 the last two or three plates, on the dorsal surface ; the 

 seventh just beyond them. Plates very long and 

 deeply fringed ; the median pair shortest ; those be- 

 tween the first and second lobes a little longer and of 

 a similar structure ; of the three between the second 

 and third lobes the first is narrowest, the other two 

 are deeply and irregularly fringed on the outer lateral 

 margins ; as also are the remaining five or six beyond 

 the third lobe. 



Puparium of the male pure white (PI. VIII, fig. 5) ; 

 usually ovate ; but the form is inconstant and varied. 



