18t»2.J 31 



to the suvfticc. At fig. 2, I have represented tlie under-side of one on the leaves : it 

 is oval, concave, ochreous, and shining, with six minute legs and ventral rings, like a 

 female Coccus, but I could not detect any proboscis or antennse. I must observe, 

 however, that the objects had all suffered from extreme pressure and great heat, and 

 it is not unusual for the proboscis to be broken off in removing such animals from 

 the surface on which they are feeding." 



It will be observed from the above quotation that Curtis fouud a 

 male Coccid iu company with the Aleyrodcs from the West Indie^^, and 

 it will be seeu from what I have said that I also found male Coccids 

 in company with Aleiirodicus on Richardia from Demerara. 



I have now come to the conclusion, with which I think Mr. 

 Douglas concurs, that the smaller of the two species which he sent 

 me, that is, the one found on the cocoa-nut, is the same as the Alei/- 

 rodes cocois of Curtis, and the larger species found on Anona and 

 Bichardia is new. 



K"ow, as the neuratiou of the wings, and the structure of the 

 genital organs of the male, are different from any species of the genus 

 Aleurodes, and as we have two species before us both possessing these 

 same characteristics, it is thought better to establish a new genus to 

 include these two species, and Mr. Douglas has suggested the name 

 Aleurodicus, which I propose to adopt. 



I should mention that Curtis (/. c), with reference to his species, 

 says : — 



" The winged specimens are larger than any of our British Aleyrodes, and from 

 the neuration of the wings being different, as well as from the remarkable anal 

 forceps of the male, this insect might with great propriety be separated from the 

 genus Aleyrodes" Signoret (Ann. de la Soc. Ent. de France, 4 serie. Tome viii, p. 

 399 [1868] ), quoting Curtis, also says: — "Ainsi il semble bien positif que c'est un 

 Aleurodes, qui parait extraordinaire et se distingue de toutes les autres especes par 

 I'innervation des elytres." 



The larva of both the species presents some very interesting 

 features. Four large, compound, funnel-shaped, glandular organs 

 (fig. 10) on each side of the abdomen of the insect exude rods of a 

 white silky flocculent substance, and towards the posterior margin four 

 other smaller and more simply constructed glands secrete a similar 

 substance, which does not, however, take the form of rods, and this 

 substance is also exuded from the entire margin of the insect, from 

 the marginal tubular glands (fig. 12). There are also numbers of 

 small coecal glands on the disc on the body, which also, I think, 

 exude a white flocculent substance, so that the insect in its larval state 

 presents an appearance something as shown in fig. 1. 



