60 NORTH AMERICAN FEVER TICK AND OTHER SPECIES. 
TaBLE XVI.—IJncubation and longevity of Amblyomma americanum. 
| | period of — 
| 
+ Minimum eit ce eH 
Eggs deposited. menced BES Been Bu _ Oviposi- | Hatchin 
to hatch. period. | : tion | rea ec 
| ; to death. | : 
Days. Days. 
Apr DRT es Skat ae see eat ie mci eel -, June 3 103 
ig STIG! OF |e AD ee es alee a ee ee 
2) UMC 8) |r et ADel aae  A OaEe Die aes (ee 
Ap ailtvily 7 seek 129+ 
July 1 145 
a One or more alive. 
From the above table it will be seen that the incubation period in 
April and May is about 7 weeks. 
of May hatched in 5 weeks. 
Eggs deposited in the latter part 
Prof. H. A. Morgan has found some specimens to pass the first 
, g 
Fig. 9.—Amblyomma cajennense: 
Greatly enlarged (original). 
were again submerged for 45 hours. 
specimen, survived. 
Mouth parts of 
molt on the host, drop- 
ping in about 10 days fol- 
lowing that molt, or just 
previous to the second 
molt. The greater num- 
ber dropped in from 4 to 7 
days. The molting of 
the nymph was found to 
last 6 weeks. Engorge- 
ment of the adult in March 
and April occupied from 
7 to 11 days. 
The resistance of the fe- 
male to water seems to be 
similar to that of the fever 
tick. Seven females were 
submerged for 18 hours, 
all becoming active fol- 
lowing removal from the 
water. The next day all 
Only one, an unengorged 
male. 
In the adult stage both sexes will reattach, as seems probable in the 
larval and nymphal stages. 
Mr. Mitchell has observed adults on grass in the act of copulation. 
CAYENNE TICK. 
(Amblyomma cajennense Fab.) 
Synonyms: J. crenatwm Say (Banks), A. mixtum Koch (Banks), J. herrere Duges 
(Neum.), A. sculptus Berlese (Neum.). 
This species was described from Cayenne in 1794, no host being 
