(aLEYRODES) ALEURODICUS PHALiENOIDES. 79 



la reunion d'un grand nombre d'Aleurodes soit a I'C'tat de larve, solt il I'^tat 

 d'insecte parfait. J'indique les deux, car je pense que ces deux 4tats con- 

 Iribuont iv cet anias do s^T-cretion par I'exauien meme de la forme particuli^re 

 des diverges laruelles; les unes pr^sentent coiume des rubans, les autres coinme 

 (les filaments, d'autres enfln de simples flls. L'insecte parfait est du double 

 plus praud que VAlciirodes chcUdonii, jaunfitre, aves des macules brunes sur 

 le protborax ; I'abdomen. euti^rement jaune dans le male, offre deux plaques 

 d'aspect particulier dans la femelle, celle-ci prfsentant un auias cotonneux 

 d'aspect nacrS et de forme bilobe de chaque cot^ de I'abdomen et secrete par 

 h'S deux j)laques rouges de Textremite de I'abdomen. Devaut donner une 

 doscrijition complete de cette int^ressante espece, que je nommerai A. lacerdw, 

 je me contente de presenter aujourd'hui ces feuilles vraiment extraordinaires 

 car si Ton connalt dejft des especes du prenre Aleurodes secr^tant des mati^res 

 ue se sont prfeent^es en aussi grande quautite. 



[Translation.] 



I have the honor, through the agency of our colleagiie, Mr. L. Fair- 

 maire, of exhibiting to the Society some leaves of Anona sylvatica 

 covered with a cottony secretion resembling amiantus and which have 

 l)een sent to me by Mr. Antonio de Lacerda. This abundant secretion 

 is due to the union of a large number of Aleurodes^ either lan'se 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, 

 shoTjs, 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-da}'^ 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 phalser.oides (Blanchard). 



(Fig. 11.) 



Aleurodeff phal(Fiioidef< Blanchard, in Gay's Historia Ffsica de Chile, Zool.. 

 vol. 8. p. 310 (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 Aleurodi^cits. The vertex, on the contraiy, 

 api3ears to be that of DiaJeurodlcus, When rediscovered, therefore, 

 the insect may prove to fall in a genus older than Aleurodicus^ but for 



