204 Asterolecaniine. 
secretion of peculiar glassy filaments; while, in Cerococcus, they 
are concerned in the production of bundles of filaments that are 
often massed together into compact tapering processes. They 
occur, in a minor degree, on the adult female of Lecaniodiaspis, 
and, in a modified form, in the adult Azomalococcus. Their usual 
form may be more appropriately described as double reniform, the 
contiguous margins being flattened or slightly concave. In most 
members of the family, these organs are confined to the dorsal 
surface; but, in Cerococcus, a few paired glands—usually of a 
smaller size—are found on the ventral surface of the abdomen. 
Small tubular glands (jg. 5), scattered thickly all over the 
derm, are common to all members of the Asterolecanine. I 
believe them to be especially concerned in the secretion of the 
homogeneous area of the test. 
Special organs, consisting of densely chitinous circular pitted 
plates (jig. 7), occur on the dorsal surface of the abdomen in 
Lecaniodiaspis, Anomalococcus, and Cerococcus. They have been 
termed ‘cribriform plates. Their function is obscure, no corre- 
sponding special feature being noticeable upon the covering test 
of such species. 
Stigmatic spines occur in species of the genera Lecaniodiaspis 
and Axomalococcus, suggesting that these genera form a connecting 
link with the Lecanzne. 
The anal segment, though possessing general characters 
common throughout the group, shows considerable diversity in 
the different genera. In Asterolecanium (fig. 1), the caudal setz 
arise from minute lobes, between which is usually a second pair 
of still smailer lobes or tubercles, each with a strong spine on its 
apex. The walls of the anal tube are usually thin, with the 
exception of the dorsal lip which takes the form of a more densely 
chitinous transverse plate. Occasionally the whole lining of the 
anal tube is densely chitinous. The anal ring normally carries six 
stout hairs; but in a few species these appear to be suppressed. 
In Lecanzodiaspis (fig. 3), the anal aperture is guarded above by a 
median transverse chitinous plate (the dorsal lip) which is more or 
less excised on its posterior margin. A large bilobed plate (or 
dermal thickening) extends immediately below the aperture. This 
plaie, though superficially resembling the anal valves of the 
Lecaniine, is not free, but closely adherent to the body. The caudal 
setze are mounted on small chitinous tubercles. The anal ring 
carries a varying number of stout flattened hairs. The posterior 
