254 
Journal of Agricultural Research 
Vol. XXV, No. S 
Fourth instar (pupa cash) (PL i, I).—On the leaf the pupa case (PI. 2) appears 
entirely covered with a mealy white secretion and rests upon a short wall of compact 
wax which remains as a ring when the case is removed. From the largest pair of 
abdominal compound wax pores, the most anterior pair, two large, rather coarse wax 
rods extend for long distances in graceful curves. The two pairs caudad of this larg¬ 
est pair possess similar wax rods, but these rods are moreslenaer and somewhat shorter. 
The more caudal pairs of pores are without rods. There appears to be no woolly 
secretion present. A pair of rods also extends from the cephalic pair of pores. Under 
the microscope pale yellowish brown in color or almost entirely transparent whitish. 
Size about 0.992 by 0.72 mm. Compound pores of seven pairs, of which one pair is 
cephalic and six pairs abdominal; the three caudal pairs, near the vasiform orifice, 
are greatly and equally reduced, being similar to the two reduced caudal pairs com¬ 
monly found in species of Aleurodicus (PI. 1, J); the two pairs cephalad of these only 
partially reduced, being functional as indicated by the wax rods extending from them 
(PL 1, K); the anterior abdominal pair largest and most complete and situated slightly 
farther mesad than the other functioning pores (Pl. 1, L); cephalic pores quite similar 
in general appearance to the median abdominal ones. Margin entire. Dorsum with¬ 
out any noteworthy sculpture. Vasiform orifice somewhat cordate but with the an¬ 
terior margin straight; operculum filling less than half of the orifice; lingula extend¬ 
ing to the caudal margin of the orifice, occasionally a trace beyond, armed with four 
stout, curved, spinelike hairs. The presence of the compound pores in the pupa case 
as compared with the earlier instars is worthy of note. Certain of those present in 
the second instar seem to be lacking in the third and reappear again in the pupa. 
Fifth instar (adult female). —The adults available for study were preserved 
dry and therefore are not in a good condition to study, the more delicate parts being 
greatly shrivelled or broken. Length from vertex to tip of ovipositor 0.096 mm. 
Color brownish yellow with a greenish tinge. Wings transparent, except for the 
powdery covering and a slight clouding, under the microscope clear transparent, 
with the costal margins reddish brown. Length of forewing 1.36 mm., width at the 
junction of R, and R s 0.592 mm., greatest width 0.64 mm. Antennae not in a con¬ 
dition for study, but evidently rather long and slender and imbricated. Vasiform 
orifice prominent with a slender lingula. 
Fifth instar (adult male). —Unknown. 
Type.—Cat. No. 26072 United States National Museum. 
Described from eggs, larvae, pupae, and adult females in balsam 
mounts, and pupa cases, etc., dry upon the foliage. 
