PARALEYRODES URICHIT. 83 
particularly (list. illy, where it becomes broadlj spa tula te; longer than orifice, 
and bearing distally two pairs of seta?. Abdominal segments lerately dls- 
tiuct. Rudimentary feet and antenna? very evident. 
Adult. — Body of living specimens buff or pinkish in color, marked with white 
Wings whitish, but clouded with dusky. These are held almost fiat along the 
dorsum, and do not meet along the middle line. A copious amount of flocculenl 
white wax is secreted, which becomes scattered over the leaf surface, the slug- 
gish adults resting in little depressions here and there in the waxy covering. 
Antennae peculiar and apparently of but four joints, due to the evident coales- 
cence into two joints of the ringed segments 3 to 7. In the forewing there is a 
single vein, as in Aleyrodes, with a rudimentary branch or fold near basal iifth 
and a very obscure rudimentary vein at very base of wing. Hind wings with 
but a single vein. Genitalia in male forcipate, penis bifurcate. Claws long and 
slender, with central spinous process. In female, length of body, 0.8 to 0.9 mm. ; 
length of forewing, 0.8 to 0.9 mm. ; width of forewing, 0.3 to 0.38 mm. ; length 
of antenna, 0.38 to 0.45 mm. ; length of hind tibia, 0.25 to 0.3 mm. Male pro- 
portionately smaller. 
Food plants. — Orange, Persea carolinensis, persimmon (?), avocado pear. On 
orange this insect infests the older leaves, rarely or never occurring on the new 
growth as is the case with Aleyrodes eitri. 
Doctor Howard has given to the parasite of this species, reared by Doctor 
Morrill, the manuscript name Encarsia variegatus. 
Type. — No. 14775, U. S. National Museum. 
Paraleyrodes urichii n. sp. 
(PL XXXI, figs. 1-10.) 
Received May 25, 1911, from Dr. F. W. Urich, Trinidad. The host 
is a species of Pithecolobiam, and there were also present on_the 
leaves two undescribed species of Aleyrodes. P. urichii differs from 
persece in its larger size and in having clear white wings, whereas in 
the latter species these are clouded. 
DESCRIPTION. 
Pupa case. — About 0.73 mm. long by 0.51 mm. wide; regularly 
elliptical in outline. (PI. XXXI, fig. 2). As seen on leaf under 
hand lens (parasitized specimens only are available), the dorsum is 
quite convex, and the case is prominently raised from the leaf by a 
vertical fringe all around of white w r ax. Dorsum of case covered by 
a layer of dirty white w^ax, through w T hich the compound wax pores 
and body segments may be fairly discerned. From the compound 
wax pores are produced the usual brittle w T ax rods, though this type 
of secretion in the present species is evidently meager. From the 
margin of case all around is a fringe of white wax more or less 
broken up into bands or ribbons, extending outward and downward, 
nearly or quite touching the surface of the leaf. 
Under the microscope the color of the nonparasitized individual is 
yellow. The empty case is colorless. Parasitized specimens appear 
darker. 
