(aleyrodes) aleurodicus phal^noides. 79 
la reunion d'un grand nombre cV Aleurodes soit a lY-tat de larvo, soil fi l'4tat 
d'insecte parfait. J'indique les deux, car je pense que ces deux etats con- 
tribuent a cet amas de secretion par l'examen meme do la forme particuliere 
des diverses lamelles; les unes presentent comme dee rubang, les autres comme 
des filaments, d'autres enfin de simples tils. L'insecte parfait est du double 
plus grand que VAleurodes chelidonii, jaunatre, aves des macules brunes sur 
le prothorax ; l'abdomen, entierement jaune dans le male, off re deux plaques 
d'aspect particulier dans la femelle, celle-ci presentant un amas cotonneux 
d'aspect nacr£ et de forme bilobe de chaque cot£ de rabdomen et secrete par 
les deux plaques rouges de l'extremite de l'abdomen. Devant dormer une 
description complete de cette intSressante espece, que je nommerai A. lacerdw, 
je me contente de presenter aujourd'bui ces feuilles vraiment extraordinaire 
car si Ton connait deja des especes du genre Aleurodes secretant des matieres 
ne se sont presentees en aussi grande quantite. 
[Translation.] 
I have the honor, through the agency of our colleague, Mr. L. Fair- 
maire, of exhibiting to the Society some leaves of Anona sylvatica 
covered with a cottony secretion resembling amiantus and which have 
been sent to me by Mr. Antonio de Lacerda. This abundant secretion 
is due to the union of a large number of Aleurodes, either larvae or 
adults. I mention the two, for I think from the examination of the 
peculiar form of the various wax plates that both states contribute to 
this mass of secretion; some of these appear like ribbons, others like 
filaments, and still others like simple threads. The mature insect is 
twice as large as Aleurodes chelidonii, yellowish, with brown macula- 
tions on the prothorax; the abdomen, entirely yellow in the male, 
shows, in the female, two peculiar looking plates; this presents on 
each side of the abdomen a bilobed cottony mass, pearly in appear- 
ance and secreted by the two red plates at the extremity of the 
abdomen. Before giving a complete description of this interesting 
species, which I will name A. lacerdce, I am contenting myself in 
presenting to-day these really extraordinary leaves, for, although 
species of the genus Aleurodes which secrete such material are already 
known, they do not show it in such great abundance. 
Aleurodicus phaleenoides (Blanchard). 
(Fig. 11.) 
Aleurodes phalcenoides Blanchard, in Gay's Historia Ffsica de Chile, Zool., 
vol. 8. p. 319 (1852). 
This insect, so far as we know, has not been observed since it was 
described in 1852, and the description is too meager to show definitely 
its position. The form and venation of the wing as shown in fig. 11 
are, however, those of Aleurodicus. The vertex, on the contrary, 
appears to be that of Dialeurodicus. When rediscovered, therefore, 
the insect may prove to fall in a genus older than Aleurodicus, but for 
