74 CLASSIFICATION OF THE ALEYRODIDiE. 



more mature examples the color may vary from whitish to those more or less 

 mottled with brownish, with extreme cases almost uniform brownish black, 

 though in these latter cases such examples have plainly been parasitized, and 

 this color may have resulted from this fact. Typically, this brownish coloration 

 occurs in dashes, from the outer margin inward, varying distances, and more 

 or less radially. Along the dorsi-meson there is a more or less clear longitudinal 

 central stripe, with an interrupted stripe of dark brown on each side, these lat- 

 ter varying considerably in extent and distinctness. In well-marked specimens 

 the radial wedge-shaped dashes may extend quite into these subdorsal bands of 

 dark brown. 



Pupa-case, when young, with moderately rounded keel, otherwise flat; at 

 length becoming somewhat convex, and raised on an unusually high vertical 

 fringe of white wax. There is no lateral fringe, but just within the margin 

 all around there is a series of groups of waxen rods. These rods arise from 

 groups of from usually 22 to 26 circular pores. Each bundle of rods is sur- 

 rounded with a rather short cylinder of wax, forming a sheath at base. In- 

 dividually, the rods are rather small, glistening white, and inclined to curl at 

 tip. These wax bundles vary considerably in length, but are, as a whole, short, 

 curling outward and downward from the case. Along central dorsal region is a 

 broad and somewhat matted secretion of wax extending from vasiform orifice 

 to cephalic end and covering the rounded keel. On each side of this central 

 dorsal secretion is a curved and narrower secretion extending from just laterad 

 of vasiform orifice to cepha'lic end. These three dorsal lines of wax may be 

 much interrupted transversely, particularly in younger examples, but in older 

 cases each is usually continuous. 



There is a very narrow marginal rim and the margin of case is minutely 

 erenulated. Just within the margin all around is a series of rather long and 

 slender tubercled setse, about 30 in all. or 15 on each side. The pores of the 

 submarginal groups are rather small, simple, and circular. These may vary 

 considerably in number in the different groups, and an occasional pore occurs 

 outside of group. These groups of pores are usually in the brownish coloration 

 extending in from the margin. There is usually a group of very small pores 

 on each side of vasiform orifice, and a very pretty group on each side of the 

 second abdominal segment. This consists of an irregular circle of small pores 

 with a central rotate figure. The usual series of brownish colored compound 

 pores with cylindrical rim and central rod are present, though comparatively 

 small. On caudal end 4 of these pores occur in almost a transverse row, 

 caudad of orifice, and from this 3 extend cephalad on each side to about the 

 fourth abdominal segment. 



Vasiform orifice cordate, about as wide as long. Operculum subrectangular, 

 about twice as wide as long. Lingula large, broad, spatulate shaped, extending 

 quite to caudal margin of orifice and bearing the usual two pairs of subter- 

 minal setae. Margin of orifice extended upward all round, but more pronounced 

 caudad, into a thin and somewhat fluted rim. Operculum and lingula mi- 

 nutely setose or punctured. On the ventral surface the reduced legs and 

 antennge are quite distinct. 



Adults unknown. 



When the adult is discovered it will very likely prove to be an Aleurodicua. 



Collected by Mr. C. H. T. Townsend. July. 1S97. at San Francisco del Peal, 

 Tabasco, Mexico, on a plant called " Palo de Gusano." Div. Ent., No. 7979. 

 Described from numerous pupa cases. 



Type.— No. 14763, U. S. National Museum. 



