D1ASPIS CAEUELI. 



163 



of glands. Basal portion of mentum very broad. 

 Free abdominal segments with groups of tubular 

 spinnerets at the margins ; and there are three inter- 

 mediate groups near each articulation, each group 

 consisting of four spinnerets arranged in a transverse 

 linear series, forming a conspicuous feature in the 

 character of the insect. Pygidium (Fig. 18) with 



Fia. 18. Diaspis carueli. Pygidium of adult female, x 250 (upper 

 woodcut). Margin of pygidium. X 600 (lower woodcut). 



five groups of circumgenital glands, which do not 

 show a great variation in their numbers, as will be 

 seen in the following formula of seven examples : 



5677 

 1313 . 1112 . 1211 . 1210 

 8_ 8 . 8 8 . 8 7 . 89 



888 



1212 . 1312 . 1112 



8_8 88 87 



