EXPLANTION OF TERMS. 



ANUS. The terminal opening of the alimentary canal. A more or 

 less circular orifice on the dorsal surface of the pygidium. It 

 varies in location from a point near the margin of the pygidium 

 to one anterior of the groups of circumgenital gland-orifices. 

 See Plate 4, Fig. 5 P. 



CARINA (plural carinae). An elevated ridge running longitudinally 

 on the dorsal surface of the male scales of certain genera. 

 Carinae also sometimes occur on female scales. 



CARIXATE. Having carinae. For a description see Carina. 



CIRCUMGENITAL GLAND-ORIFICES. These are circular gland-orifices 

 arranged in groups around the genital aperture and furnish a 

 powdery secretion for dusting over the eggs as they issue from 

 the body. See Plate 4, Fig. 5 A. 



DORSAL GLAND-ORIFICES. On the dorsal surface of the pygidium are 

 oval orifices through which the glandular secretions of which the 

 scale is formed, are discharged. These are arranged in more 

 or less distinct rows which mark the dividing lines of the 

 transformed segments. Each row is usually divided near the 

 middle forming two groups which are termed the anterior and 

 posterior groups. These are shown at B and C, Plate 4, Fig. 5. 

 These rows are designated as first, second, third and fourth ; 

 the first row being the one nearest the median line of the body 

 and always extending to the edge of the pygidium between the 

 median and second pair of lobes. See Plate 4, Fig. 5. In a 

 very few species of the Diaspinae another poorly defined row 

 occurs still nearer the median line and extends to the edge of 

 the pygidium between the median lobes. 



EXUVIA (plural exuviae). The dorsal integument of the early stages 

 which has been molted off and incorporated into the scale. 

 The smallest and uppermost exuvia is designated astheyfr^/ and 

 the larger under one as the second. 



FIRST EXUVIA. See Exuvia. 



GLAND-BEARING PROMINENCE. A prominence on the margin of the 

 pygidium bearing a gland-opening on the dorsal surface. See 

 Plate 4, Fig. 5 j. 



