ALEUKODICUS GUPPYII. 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 (PL XV, fig. 4). On ventral surface legs and antenna) 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. — No. 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 latiflora 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 host plant, principally the basal two- 
thirds (see PL XVIII). This area is more or less covered with a 
powdery 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 (PL 
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 (PL 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 
with very light crenulations, but no distinct marginal rim. On the 
submarginal area, however, are innumerable closely set small pores, 
forming a broad band all around the case (PL XVI, fig. 5). 
On the dorsum are seven pairs of compound wax pores (PL XVI, 
fig. 4), one pair on the cephalic region and four pairs on the ab- 
61201°— 13 5 
