NO. 2156. SUBFAMILY ALEYRODINAE—QUAINTANCE d BAKER. 347 



ridge. Suture separating thorax and abdomen much curved, as 

 indicated in figure. Submarginal area armed with a series of 34-36 

 spines. These vary considerably in relative length, but in most 

 specimens they are as indicated in figure 1, being of nearly equal 

 length on the thorax, but on the abdomen having five of the spines 

 much longer than the others. In the pupa case on slide No. 5234 

 there is quite a cUfferent arrangement, as is shown in figure 9. 

 In this example the spines on the submarginal area of the abdomen 

 are alternately long and short. Those of the long series average 0.48 

 mm. in length and those of the small series 0.2 mm. On the abdomen 

 there are, as a rule, nine pairs of spines other than those of the sub- 

 marginal series. Three of these are long and the remaining pairs 

 short. The vasiform orifice (fig. 7) forms the caudal extremity 

 of the median dorsal ridge. It is, therefore, elevated and is somewhat 

 subcordate in outHne. The operculum is straight on its cephalic 

 margin and almost entirely fills the orifice, obscuring the Hngula. Two 

 pairs of long setae are present on the case, one pair on the caudal 

 margin and the other pair just cephalad of the vasiform orifice. 

 The margin (fig. 5) is armed with prominent knobbed teeth. 



On the leaf the specimens are black and shiny, with the dorsum 

 highly arched, and the abdominal segments not distinctly marked. 

 There is almost no dorsal secretion, but occasionally there is a sUght 

 woolly patch which seems very hghtly attached to the pupa. The 

 small patches of wax are sometimes found sticldng upon the spines, 

 which are quite erect. The margin has a narrow fringe of white wax, 

 more or less wooUy in appearance, which is on the very base of the 

 case against the leaf. In some specimens this marginal fringe is 

 almost lacking, the cases being completely jet black. 



Adult. — Unlvnown. 



Described from numerous pupa cases, larvae and eggs in balsam 

 mounts, and pupa cases dry upon the leaf. 



Types.— C&t. No. 19098, U.S.N.M. 



ALEUROCANTHUS NUBILANS (Bnckton). 



Aleyrodes nubilans Buckton, Ind. Mus. Notes, vol. 5, 1903, p. 36. 



This species is unknown to us in nature and the description is so 

 indefinite that we are unable to compare it at all satisfactorily with 

 our material from IncUa. We have not been able to secure any 

 similar species from the host, betel, or other plant. 



Description. — Legs long and hairy with dimerous tarsi. Antennae 

 rather long and with seven ( ?) joints in the female, which is a larger 

 insect than the male. Wings four, rounded at the apices, and fringed 

 with minute hairs. A single unforked central nervure, not continued 

 to the margin. Membrane smoky in patches, with a darker blurred 



