ALEURODICUS GUPPVII. 59 



Vasiform orifice large, cordate, about as broad as long. Oper- 

 culum short and broad, the caudal margin concave. Lingula very 

 prominent, spatulate, dark brown in color, bearing distally two pairs 

 of spines (PI. XV, fig. 4). On ventral surface legs and antennee are 

 quite distinct. 



Adult female. — Forewings about 2.4 mm. long by 1.3 mm. wide; 

 legs long and slender. Hind tibia 0.9 mm. long; basal tarsal joint 

 0.23 mm. long, distal tarsal joint 0.14 mm. long. 



Adult male. — Essentially as in female, though tibia and tarsus are 

 slightly longer in each case. Valves of forceps long, narrow, and 

 strongly curved at tip (0.86 mm. in length). 



Type.—^o. 14764, U. S. National Museum. 



Aleurodicus guppyii n. sp. 

 (PI. XVI, figs. 1-11; PI. XVII, fig. 2; PI. XVIII.) 



This species was received from Dr. F. W. Urich, Port of Spain, 

 Trinidad, May 25, 1911, on Rheedia latifora L. The large brown 

 maculation on forewing of adult insect readily separates it from any 

 form heretofore described. The insect infests the lower surface of 

 the large leathery leaves of its hosi plant, principally the basal two- 

 thirds (see PI. XVIII). This area is more or less covered with a 

 powdeiy white wax secreted from the abdomen of the adults, in 

 which are embedded the immature stages. 



DESCRIPTION. 



Egg.— Size about 0.32 by 0.16 mm. Subelliptical in outline, the 

 stalk very short, attached to one side of end of egg. Color on leaf 

 brownish; lighter under transmitted light, without markings (PI. 

 XVI, fig. 1). 



Pupa case. — Size rather variable, averaging about 1.13 by 0.70 mm. 

 Elliptical in outline, the dorsum but little convex, though the case is 

 prominently raised from the surface of the leaf by a vertical rim all 

 around of white wax. Dorsum void of secretion, except the usual 

 glassy wax rods from the compound wax pores. This secretion, how- 

 ever, is meager, the rods being short and fragmentary (PI. XVI, 

 fig. 2). 



On leaf, under hand lens, the color is yellow or brownish-yellow; 

 and under microscope yellowish white to darker. Margin of case 

 witli very light crenulations, but no distinct marginal rim. On the 

 sul)marginal area, however, are innumerable closely set small pores, 

 forming a broad band all around the case (PI. XVI, fig. 5). 



On the dorsum are seven pairs of compound wax pores (PI. XVI, 

 fig. 4), one pair on the cephalic region and four pairs on the ab- 

 61201°— 13 5 



