148 LIFE HISTORY OF NORTH AMERICAN TICKS. 
TaBLeE LXIV.— Molting of engorged nymphs of Amblyomma americanum. 
Date Engorged nymphs molted—days following dropping. 
engorged ; Num- 
nymphs Host. ber. 
dropped. 13} 15] 16} 17 | 18 | 19 | 20 | 21) 22] 23] 24 | 25 | 26| 28} 31} 32] 45| 46 
Aug. 3, 1907 | Bovine..... 14/0 |2¢ {ig sate 0|;0 0 0 j0 |}0 |0 j0 }0 }0 0 j0 10 
5Q| 39| 
Avie 41 90 Tle ce Goszses-e 3/1¢g)/0 | 22/0 |0 |0 |}0 [0 |}0 |O0 |0 |0 JO [0 jO 0 jO 10 
June 16, 1908 | Horse.......-. DOR NOP NO my OO: 1¢;0 }0 j0 (0 }0 }0 j0 0 0 }0 |0 [0 
June 20,1908 | Bovine... . 1/0. |0 10 |} O00 |} 0 {0 l1d|0 0 | 0 10 10 0) 1010 0e8 
June 21,1908 |..... iki ee LO Oe 0: Oe 0! 10 1gj0 |j0 j0 }0 |0 |}0 jO (0 0 |0 {0 
June 23,1908 |..... DOs asus 10, 10° [0.0 0! | 0 Py) 0" 10) 10,7102 180. 1.0. 0), 010 Os Oaaie 
Aug. 21,1908 | Dog.......... 4/0 lo lo {3 \29 o lo jo lo lo Jo |o |o fo lo fo Jo (° 
Aug. 23,1908 | Bovine..-..... 4.10) 102-0. Wes 9\-0) 0) 0) 10.10" 105 16) G18) 700 (° 0 (0 
Aug. 24, 1908 |... dake ct): slo lo lo {13 \1g (ie \ig izligio |o }o lo jo 0 0 |o jo 
Aug. 25,1908 |..... "evi 7lo lo |iglig| 1a {ig \19 0 lo lo |o Jo |o Jo fo fo [0 Jo 
Sept. 4,1908 | Rabbit....... 6\0 jo |o |}o |o |o Jo |o l1¢l2¢ iio }o i0 jo jo |o jo Io 
Sept. 2,1909 | Bovine....... 20 lo |ighe {ig \o 0 lo jo lo |o [o jo Jo jo Jo Jo Io 
Sept. 10,1909 | Bull......... LO HOR WOOF 10) i) 0) O90 10) 10) 0 0 SOO Oe Gee 
Sept. 12,1909 |..... doce ncue QO Ou WiO) Oo} 0 Or NO. 10). 10, 10P 0). | ZOOM ONO SONGS 
Sept. 13,1909 |..... Goss se a88 Ll OgOee| (0) A050 0h 0 000s Vip 12/0 |0 [0 (0 (0 |0 
Sept. 15, 1909 |..... (s (jeer 2/0 0 |0 0 0 0 0 0 |}0 |0 0 0 }0 j0O {19\19)/0 |O 
Man /20; 0910) |. 32: dose on ae TO OM KO 0 0 0 0 0 |0 |0 0 0 |0 j0 |0 0 13/0 
Mar. 23,1910 |..... ts Coe Me eae L100) {40 0 0 0 0 |0 |O0 |0 0 0 10 j0 0 0 |1¢\0 
211) 2) CO OR ee 70 
[%=Male. 9 =Female.] 
Temperature from dropping to date 
Date Number molted. first tick molted. 
engorged : Num- 
nymphs Host. ber 
dropped. Male. |Female. Total. | yaximum.| Minimum. doin meee 
Aug. 3,1907 | Bovine............ 14 4 8 12 
Aug. 4, 1907 3 1 2 3 ae 
June 16,1908 1 0 iL 1 90.0 70.5 80. 96 
June 20, 1908 1 1 0 1 93.5 70.5 81. 52 
June 21,1908 1 1 0 1 93.5 70.5 81. 57 
June 23, 1908 1 0 1 1 99.0 75.0 83. 60 
Aare: S21" 19088 Dogieas oes Se 4 1 3 4 97.5 75.0 83.72 
Aug. 23,1908 | Bovine...........- 4 0 3 3 97.5 75.0 83. 96 
Aug. 24,1908 |..... Gos:7. 4552-3 8 6 2 8 97.5 75.0 84. 04 
Aug. 25,1908 |..... GO es ce moeas ae 7 5 2 7 97.5 75.0 84.19 
Sept. 4,1908 | Rabbit............ 6 1 4 x 97.0 70.0 81.1 
Sept. 2,1909 } Bovine............ me i? 6 4 10 101.0 68.5 86.6 
pepts 10; 1909 ||, Bull. 2 2 cec ce < 1 1 0 1 101.0 56.0 79.3 
Sept. 12,1909 |..... (6 (oe my ae 2 0 2 2 98. 5 56. 0 75.6 
Sept. 13,1909 |..... GOs cree errr 1 0 1 1 96.5 56.0 75. 2 
Sept. 15,1909 |..... Oho sae taker ee 2 0 2D 2 95.5 52.5 75.6 
Mar) 21 1910 coce (Ko ee ae ee oe 1 1 0 i 92.0 43.0 86.2 
Mar 2s. tone GO enian chanson. 1 1 0 1 89.0 43.0 86. 2 
SE OUAILE sl bee ee oars. fe hee 70 29 35 (7 a (ee ene Pa eee fle En mc 
recorded was between 393 and 430 days. 
The adult (Tables LX V-LXVI).—The greatest longevity of adults 
The longevity records given 
below were based upon adults kept in cotton-stoppered glass tubes 
on moist sand in the laboratory. It is quite probable that the lon- 
gevity would have been greater had the ticks been kept out of doors. 
The females appear to live longer usually than the males. 
lot of ticks recorded in the table is the only one in which the last 
surviving tick was a male, 
The first 
