11 
Ak.-e-r 
<fci" 
FlG. 7. 
Aspidiotns eyanophylli of Oreen 
(original). 
former occurs on sugar cane, the latter on yams, and I have not the 
least doubt that they were both introduced from the tropics of the Old 
World, though they have not yet been detected there. In certain fea- 
tures, and strikingly in the peculiar light purplish-brown tint of the 
scale, they are recalled by the Cey- 
lonese A. tr il obit i for mis ^ which, how- 
ever, departs more than they do from 
typical Aspidiotns. I am inclined to 
suppose that these resemblances indi- 
cate some real affinity. 
We therefore dismiss Aspidiotns s. 
str. as not American. In the Old 
World it is quite abundant; espe- 
cially, it would seem, in the warmer 
parts of the temperate zone. Just 
how many species are known can 
not be stated, since several of those described are more or less ques- 
tionable, either as to their validity or their position. There would seem 
to be about a dozen in Europe. 
Diaspidiotus (Berl. and Leon.) Ckll. 
This subgenus was founded by Berlese and Leonardi for a mixture of 
species belonging to different groups. Xo type is designated, but A. 
ancylus is included, and may be taken as the type. This is the group 
in winch the scale is usually dark-colored: the exuviae are covered; 
the median lobes of the female are usually quite close together and 
much larger than the others, and there are between the lobes u inci- 
sions, with thickened edges.'' This is a circumpolar subgenus of the 
north temperate zone, living mostly on deciduous trees. Its food- 
plants and range coincide 
to a great extent with the 
subgenus Eulecanium of Le- 
canium. 
In America this subgenus 
has several known species, 
and no doubt several await 
discovery. As we enter the 
tropics it almost disappears, 
or is replaced by the modi- 
fied type Hemiberlesia ; but 
in the West Indian region 
are two convex species which 
must be referred to Diaspi- 
diotus — A. punicce and A. diffinis. It is unfortunate that we know so 
little of the coecidae of the south temperate zone of the Xew World, but 
in Chile is found at least one native Aspidiotns, A. latastei, which must 
be regarded as a much modified Diaspidiotus. 
■\rAol^--f^r 
Fig. %.— Aspidiotns trilobitiformis (original). 
