222 CHAS. K. BRAIN. 



| twice the width of one median lobe and far removed from the tip ; median and 

 anterior lateral paragenitals contiguous, forming an arch ,21 to 23 posterior laterals 

 10 to 16." (Sasscer). 



Habitat : On camellia and palms. Fairly common throughout the Union. 



Collection No. : 187. 



Genus Diaspis, Costa. 



Scale of adult $ circular or nearly so, with the exuviae usually situated towards 

 one side but entirely within the margin, occasionally almost central. Ventral scale 

 usually delicate. The $ puparium differs in form and texture from that of the § scale 

 and is generally elongate, parallel-sided, small, white, and often tricarinate. This 

 genus is readily distinguished from Aspidiotus by the different form of the male. 

 The species included by some writers in the genus Aulacaspis seem to indicate a 

 connecting link with insects of the Chionaspis type, with which Diaspis seems to be 

 closely related. On the other hand insects included in the sub-genus Epidiaspis 

 form a natural link with Aspidiotus through the sub-genus Diaspidiotus. These 

 three sub-genera may be distinguished as follows : — 



A. Pygidium with club-shaped glands, reminding one of Diaspidiotus. 



1. Dorsal glands in single rows, small inconspicuous .. .. Epidiaspis. 



B. Pygidium without club-shaped glands. 



2. Dorsal glands appearing irregularly disposed . . . . . . Diaspis, s. str. 



3. Dorsal glands in regular rows . . . . . . . . . . Aulacaspis. 



124. Diaspis bromeliae (Kerner) Sign. (Plate xv, fig. 143). 



Coccus bromeliae, Kerner, Naturg. pp. 20, 52, 1778. 



Chermes bromeliae, Bdv., Ent. Hort. p. 334, 1867. 



Diaspis bromeliae, Sign., Ann. Soc. Ent. France, (4) ix, p. 434, 1869. 



Aulacaspis bromeliae, Ckll., Can. Ent. xxvi, p. 33, 1894. 



Diaspis bromeliae, Newst., Mon. Brit. Coca i, p. 156, 1901 ; Lindinger, Die 

 Schildlause, p. 66, 1912. 



Scale of adult $ about 2 '2-3 mm. in diameter, flat or slightly convex, + circular, 

 thin, + transparent, yellowish or greenish in cokrar. Exuviae almost central in 

 many specimens, but occasionally near one margin, dark yellow to pale brown. 



Adult $, when mounted, about 0'8 mm. long and 0'6 mm. broad, moderately 

 elongate, hyaline, with the abdominal segments moderately produced at the margins. 

 The pygidial margin (fig. 143) has three pairs of lobes ; Lj largest, divergent, with 

 then inner margin finely serrate and their distal extremities rounded ; L., and 

 L 3 each composed of two sub-equal lobules, whose distal edges are flatly rounded. 

 Outside L 3 there is a spine and a dagger- shaped spine and beyond this what may 

 be considered as a rudimentary L 4 . About half-way up the pygidial margin there 

 is a large gland-pore opening into a pointed process whose point turns slightly 

 outward from the body ; in some cases it is dense and appears as a stout strong 

 spur. Circumgenital glands in 5 groups : — 



7—11 

 13-21 13—21 

 12—18 12—18 



