766 Journal of Agricultural Research voi. xxx, no. 8 
Gedoelst (4) records Ascaridia lineata 
from the chicken in the Belgian Congo. 
Boulenger (2) records and figures 
Ascaridia lineata from the chicken 
in Zanzibar on the basis of a single male 
specimen. His figure (fig. 7) agrees 
in all respects except one with that of 
Von Linstow and Travassos, the 
exception being the direction of the 
second lateral papilla, which is de¬ 
scribed as being turned ventrally, thus 
agreeing in this respect with Schneider's 
figure. Boulenger observes that these 
discrepancies are probably due to 
individual variations. 
According to Boulenger ( 2 ) Ascaridia 
hamia, a species described by Lane 
(5) from the intestine of chickens in 
Bengal, India, is Ascaridia lineata , 
a view with which the present writer 
is in full agreement. Lane’s figure and 
Q-2mm 
Fig. 7 —Ascaridia lineata (after Boulenger, 1923) 
description of the papillae (fig. 8) show 
a perfect agreement with those of 
Schneider, Von Linstow, Travassos, 
and Boulenger, and although his 
description of the species as a whole 
shows some discrepancies as compared 
with the present writer’s observations 
on A. lineata, these discrepancies can 
all be accounted for, as will be presently 
shown, on the basis of individual 
variation. 
According to Travassos (16), Hete- 
rakis brasiliensis Magalhaes, 1892 
(9), is also a synonym of Ascaridia 
lineata. Magalhaes’ description is 
rather vague as regards the papillae 
on the tail of the male and does not 
agree with his figure in all respects. 
He states that the worm has 9 pairs of 
lateral papillae, but he actually enu¬ 
merates 10 pairs and one accessory 
papilla. Certain of the papillae re¬ 
ferred to by Magalhaes as lateral are 
obviously ventral in position. The 
description that Magalhaes gives of 
H. brasiliensis is too incomplete to 
permit any definite opinion as regards 
the status of that species. 
In all of the records of the occurrence 
of Ascaridia lineata which have just 
been reviewed, excepting that of 
Schneider, no mention is made of 
A. perspicillum as a parasite occurring 
alone or in association with A. lineata 
in the same host species. This fact is 
of importance and indicates that when 
specimens of Ascaridia from chickens 
and related domestic birds have been 
actually studied morphologically they 
have been found to be A. lineata, 
which is apparently the common 
species of Ascaridia in domestic birds. 
Fig. 8 .— Ascaridia hamia (after Lane, 1914) 
OBSERVATIONS ON ASCARIDIA 
LINEATA BY PRESENT WRITER 
Observations on Ascaridia lineata by 
the present writer were made on 
material collected in the United States 
by various workers in this laboratory 
in the vicinity of Washington, D. C., 
as well as on material forwarded to 
this bureau for determination from 
several different localities. In addition 
to American material, specimens col¬ 
lected from chickens in the Philippine 
Islands and at Tonkin, Indo-China, 
were also studied. In material for¬ 
warded from Indo-China immature 
specimens of A. lineata from the goose 
(fig. 9) were identified, this host being 
new for this species of parasite. 
In all specimens that have been 
examined, the number and arrange¬ 
ment of the papillae on the tail of the 
male correspond to those described by 
