33 
Noioedres cati in Capyhara (No. 5603) : — This arachnoid 
induced mange in the capybara, just as it does in the 
cat and rabbit. 
Spiroptera incerta recrudescence. This has been the 
most important and disturbing parasitological incident 
of the year. This parasite ran riot in the parrot house 
up to 1913, having been met with up to that time in 
30 per cent, of all Psittaci coming to autopsy, and doubt- 
less causing death in a large number of them. (See 
1912 Report, page 41). Following this the disease was 
cleaned out, and had not reappeared in any birds up 
to the past year. During these eight years we had been 
routinely examining every newly arrived parrot to pre- 
vent re-entrance of the disease, but without detecting 
a single infestment. 
Au- Date Date Time Spi- How 
Bird topsy Habitat of of in col- ropters detected 
No. Arrival Death lection Species 
( Lineated Barbet. 5776 India 5/18/20 9/14/20 4 mos. Sp? Autopsy 
Group I ) Banded Toucan. 5789 Cent. Am. 4/20/20 9/20/20 5 mos. 
(south ■( " " 5823 " 4/20/20 10/7/20 6 mos. " Micro, exam, 
wing) j " " 5909 " 5/13/2011/16/20 9 mos. 
( " " 6042 " 5/13/20 2/9/21 
^ /"Grand Electus. . 6040 MoluccaslO/11/18 2/6/21 4 mos. Incerta Autopsy 
Group II I Sun Bittern 6025 Cent. & 
(north <v So. An). 7/21/19 12/2/21 6 mos. 
wmg) ^^Mexican Guan. .(Alive) Mexico 4/28/20 10 mos. " Micro, exam. 
Remarks: — The table above brings out several points. 
First, there is not, either in Group I or Group II a com- 
mon geographical source. It appears as though the 
infestation had been acquired at the dealer's or here in 
the Garden. 
Second, most of the birds arrived in the spring of 1920. 
Third, the birds died within from four to ten months 
of their arrival. If we accept the idea that the infest- 
ment occurred here it means that the parasite kills rather 
quickly. 
The present outbreak began in September, 1920, and 
concerns two very different groups of birds. The first 
came to light at autopsy on a Lineated Barbet, ^. e., 
not in the parrot family which we had been so carefully 
watching. Birds in the neighboring cages were at once 
examined with the result that three toucans were quaran- 
tined.* All of these occupied the extreme south wing 
* In subesquent examination five months after the first test the Lineated Barbet's 
cagemate was detected and isolated. This gives some indication as to the time the worm 
takes to develop. 
