ALEUROCHITON FORBESII. 89 
summer, emerging August 4. From these larvae several hymenopterouf paraeitet 
belonging to the genus Elaptus escaped September 6, the species of which is ap- 
parently new. 
ElaptitA aleurodis, n. s. Plate XI, fig. G. Female Length .<<:; of an inch; the 
head .005 Inch; front wings .032 of an inch long and .00] Inch wide; posterior 
wings .00o2 inch wide at the widest point; antenna as long as the head and 
whole body: scape stout, arcuate, rising to the lop of the head, about ;is long 
as the three following joints, nearly smooth, as is also the second joint ; re- 
maining joints densely pilose; the club not jointed, as long as the three joints 
preceding; first joint obconic, second about the same length but narrower. Color 
black, surface shining, abdomen alutaceous, head and thorax punctured, antennae 
yellow, legs entirely yellow, femora and tibiae of the middle and posterior legs 
black, their tarsi yellow. 
Described from three specimens bred from Aleurodes acetic. 
In 1893, Dr. W. H. Ashmead pointed out (Bui. 45, U. S. Nat. Mus.,' 
p. 294) that Forbes's name was preoccupied by aceris Geoffroy, a 
European species, and proposed for this species the name forbesii. 
In his excellent paper " Uber einige Arten der Familia Aleurodida? " 
(Arkiv fur Zoologi, Bd. 3, No. 26, p. lo, 1907), Dr. Tullgren has 
shown that the European species {aceris Geoffroy) really represents 
a new genus, for which he proposed the name Aleurochiton. The 
general similarity of the pupa case of forbesii to that of aceris sug- 
gested that the two forms were closely related if not identical, which 
supposition was the more strengthened for the reason that they have 
similar food plants. Although forbesii is fairly common on maple 
in the eastern United States, it is only recently that we have had 
opportunity to examine the adults of this insect. During the summer 
of 1910, Dr. C. W. Hooker secured the adults in some numbers at 
Cranmoor, Wis., and also the following season, at Vienna, Ya. Our 
species proves to belong to Aleurochiton, but appears to be distinct 
from aceris Geoffroy, as will be seen from the description which fol- 
lows: 
Aleurochiton forbesii is fairly common on Acer ,rubrum. A. sac- 
charinum, and A. dasycarpum, ranging from Georgia to Xew York, 
north into Canada and west to Wisconsin, Illinois, and Missouri. So 
far as we are aware the insect has never been so abundant as to cause 
injury to its host plants. The European member of the genus, how- 
ever, has recently attracted attention by its injuries as shown by Mr. 
Max Wolf in a lengthy article " Ein Beitrag zur Kentniss von 
Aleurochition aceris Geoffroy," etc., in " Centrallblatt fur Bakter, 
Parasiten Kunde, U. Infektions Krankheiten, Bd. 26, April, Zweite 
Abteilung, 1910, page 643. 
DESCRIPTIVE REMARKS. 
Egg. — Length about 0.24 mm. exclusive of stalk. Fusiform in 
shape, not quite one-third as wide as long; stalk about one-fourth 
length of egg. Color white, without markings, though the globu- 
