428 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 51. 



rowed. The pores of these folds open close to margin and have the 

 appearance shown in figure 2. There are no dorsal wax pores, but 

 on each side of median line of each abdominal segment are a few clear 

 white dots. From the region of the dorsal disk to the periphery a 

 radiate pattern is evident, due to the mesal extension of the marginal 

 wax tubes. 



Vasiform orifice (fig. 3) subcordate in outline, the cephalic margin 

 straight. The caudal rim is without teeth or fimbriae as are present 

 in citri. Operculum with about the same outline as orifice, which 

 it nearly fiUs, almost obscuring the lingula, the tip of which pro- 

 trudes (fig. 4). 



Adults. — Unknown. 



Type.— Ca.t. No. 19054, U.S.N.M. 



DIALEURODES (GIGALEURODES) BUSCKI, new species. 



Plate 71, figs. 5-12. 



Several leaves infested with this species were collected by Mr. 

 August Busck, January 15, 1899, at Bayamon, Porto Rico. The 

 host plant is stated as ''a climbing vine." The immature stages 

 occur on both surfaces of the leaf. 



Pu2>a case (fig. 5). — The insect in this stage much resembles in 

 general appearance citri. Many of the individuals, however, have 

 the dorsal disk dark brown. However, this character appears not 

 to be constant, as many colorless specimens are to be found 

 from which the adults have emerged. There is no waxy secretion 

 evident. As observed under hand lens, the dorsum is seen to be 

 much wrinkled by the body sutures and the submarginal area is 

 marked with fine radiating lines extending from dorsal disk all 

 around to margin of case. 



The margin is marked with many minute, acute incisions between 

 the wax tubes, the sutures between which are more or less evident 

 well toward the dorsal disk and give the radial appearance noted under 

 the hand lens. All around margin there is a narrow and not well 

 dehneated light-colored band. Many apparently normal individuals 

 have the dorsal disk brown in color, and there are gradations from 

 this condition to individuals colorless throughout; the shape is oval 

 and flattened, broadest across the second and third abdominal seg- 

 ments; size about 1.59 by 1.28 mm. The three tracheal folds evi- 

 dent marked with minute dots, as in citri. Tracheal pore opening 

 almost on margin of case (fig. 6), the opening with a few teeth 

 or fimbriae; body sutures distinct; along each side of median line of 

 abdomen, a pair to each segment, and here and there on the thorax, 

 arc minute white dots in the derm, quite evident against the sur- 

 rounding dark brown color of this region. The case is quite void of 



