58 CLASSIFICATION OF THE ALEYEODIDiE. 



Hibiscus rosa-sinensis; Guadalajara, on Hibiscus; and on mulberry, 

 locality unknown. The original description by Prof. Cockerell fol- 

 lows : 



Leugth If mm. ; length of anterior wing, 2\ mm. ; its greatest breadth nearly 

 IJ mm. Pale grayish-ochreous, covered with white meal, abdomen beneath 

 shining silvery. Wings white; upper wings iridescent, with markings similar 

 to those of A. ornatus, but very pale gray and quite different in detail. There 

 are four gray bands crossing the wings, of which only the third and fourth are 

 joined by a longitudinal band. The first (basal) baud bends abruptly inwai-ds 

 after crossing the main nervure, which branches so near the base of the wing 

 that there are practically two nervures, the first gray band failing in the angle 

 between them, but strong again beyond the second. Second gray band broad 

 as far as the first nervure, just beyond it interrupted broadly, but continued as 

 a large, nearly circular gray patch, the greater part of which is above the 

 second nervure, which it meets at its fork; after that failing, but reappearing 

 strongly a little way down the lowest branch of the nervure and thence passing 

 downwards, becoming very faint. Fourth band broad, passing across the end 

 of the fork, bent inwards, joining the continuation of the third band after the 

 break, itself forking at its lower end. The curve of the fourth band leaves a 

 white apical area in which there is a gray spot. There is also a gray spot at 

 the tip of the second nervure. 



The pupae occur on the under sides of the leaves and are of the usual type-^' 

 oval, flat, pale ochreous, with white mealy powder. 



Habitat. — Guanajuato, Mexico, on Hibiscus rosa-sinensis. Sent by Dr. Alfred 

 Duges in great quantity. Dr. Duges writes that it is also found on the large- 

 leafed Begonia and other plants, and it does not appear to do them a great 

 deal of harm. It is the first Aleurodicus described from Mexico, and is most 

 nearly allied to the Jamaican A. ornatus, Cockerell. The genus now includes 

 five species, all neotropical except the U. S. A. asarumis (Shimer, 1867). 



DESCRIPTIVE REMARKS. 



Egg. — About 0.3 mm. long ; stalk short, from one side of end ; color 

 dusky; shell unmarked. 



Pupa case. — Size rather variable, from 1.15 to 1.3 mm. in length, 

 by 0.7 to 0.85 mm. in width. Ovoid or subelliptical in shape ; brown- 

 ish in color, as seen on leaf, varying to plumbeous in some speci- 

 mens, probably parasitized. Case moderately convex, raised some- 

 what by a vertical fringe all around of white wax (PI. XVII, fig. 1). 

 Dorsum of case powdered with dirty white wax, and from the com- 

 pound wax pores are produced the usual brittle glassy wax rods 

 (PI. XV, fig. 1). 



Under microscope, empty case colorless, except the prominent 

 lingula, which is dark brown. Abdominal segments distinct. Margi- 

 nal fifth or sixth of case all around with many small round simple 

 wax pores (PI. XV, fig. 6). On dorsum also are seven pairs of com- 

 pound wax pores, one on cephalic end and six on abdomen, the last 

 two pairs being much reduced (PI. XV, fig. 5). There is a pair of 

 strong spines on caudal margin of case. 



