
Coccidae and Aleurodidae 
of 
Madagascar and Comoro Is. 
By 
Robert Newstead, M. Sc.; A. L. S. etc. 
The School of Tropical Medicine, the University, Liverpool. 
With 4 figures. 
The collection of Coceidae and Aleurodidae made by Dr. Voeltzkow in Madagascar and the 
adjacent island Mayotte, Comoro, although not an extensive one comprises species of great interest and 
also of economic importance. With the exception of Gascardia madagascariensis all the species are new 
records for these Islands; and there are two species and two vars. new to science! viz: Lecanium nicotianae, 
Dacetylopius virgatus var. madagascariensis, Icerya seychellarum var. cristata, and Aleurodes Voeltzkowi. 
I had long been desirous of obtaining examples of Gascardia madagascariensis Targ.-Tozz., and 
now that the opportunity has arisen for examining this insect, I have been, in no small measure, surprised 
to find that it is in no way related to the lac-producing insects of the genus Tachardia. This interesting 
‚inseet is evidently a precinctive species, as it has not been recorded from any other part of the world. 
Although apparently common in its native habitat, it is evidently rare in collections of Coccidae; and so far 
as I can gather, no one has referred to this inseet since it was described by Targioni-Tozzetti in 1893. 
Another insect worthy of comment is the Monophlebid, Zcerya seychellarum. This inseet, judging 
by the numbers of individuals crowded together along the midrib of the leaves of the Citrus, must have 
caused serious injury to the tree. Mytilaspis citricola, a well known and widely distributed pest of the 
Citrus, etc. was living in company with the last named insect, so that together these pests must have sorely 
taxed the health of the trees which they infested. 

! Owing to an unfortunate misunderstanding on my part the descriptions of the new species have already appeared in 
the Journal of the Institute of Commercial Research in the Tropics, Vol. III. p. 2. Jan, 1908; but as this is not, strietly speaking, 
a recognised scientific publication the author deems it desirable that these insects should be described in full in this communi- 
cation. R. N. 
