144 LIFE HISTORY OF NORTH AMERICAN TICKS. 
upon the Atlantic Ocean and Gulf of Mexico and from several inland 
States, including Michigan, Kentucky, Missouri, Arkansas, and 
Oklahoma. It is also reported to have been collected in Guatemala, 
Guiana, and Brazil. The species is very abundant in a large part 
of the States of Texas and Louisiana. 
LIFE HISTORY. 
Information on the biology of this species has been published by 
Leidy (1891), Morgan (1899), Hunter and Hooker (1907), and by 
Hooker (1908). 
The egg (Tables LVIII, LIX).—In the laboratory in June at a 
mean temperature of 87.7° F. oviposition commenced as early as the 
fifth day from dropping, while out of doors in July and August at a 
mean temperature of about 81° F. seven or more days were required. 
The longest preoviposition period recorded was 13 days. At a mean 
‘temperature of 80° F. one tick continued oviposition for 23 days. 
This individual, however, was one of the largest met with (measuring 
15 by 12 by 8 mm.) and deposited the maximum number of eggs 
recorded for the species, namely, 8,330 eggs between May 25 and June 
16. The maximum, minimum, and average preoviposition period 
for 12 ticks, the deposition of which is recorded in Table LVIII, was 
9,5, and 7 days, respectively. The maximum, minimum, and average 
oviposition period for these ticks was 23, 8, and 13.25 days, respec- 
tively, and the average number of eggs deposited was 3,053.5 per 
tick. 
TasLe LVIIT.—Oviposition of Amblyomma americanum. 
Number of eggs deposited—days following dropping. 
Date engorged female 
dropped. 
| 6 7 8 9 10 11 12 13 14 15 16 17 
1906. 
ADT Dic 20. Bete eias ac see 0 On 0 74 31} 118 89; 230] 399} 503 | 464 338 
May 15 0 0 0} 178) 383) 583} 213] 465] 356) 230 3 
Do 0 0| 390 | 417] 656} 835) 963/. 50] () 572 | 229 201 
Do 0 (1) 414 285 504 594 361 210} (}) 156 66 55 
Do 0 0) 193) 301] 409| 271) 197 82] () 144 24 64 
Do 0 0] 180) 187} 209] 144 99 57] @) 53 14 4 
Do wif) 0 58 | 206] 380] 368| 187 53 | () 118 36 36 
Do 0 0 42) 201) 307 | 264) 197 | 110 | () 89 41 39 
1908. | 
Mayi6:-.55. 50-506 = 5s eens 0 0 0 0 54 | 485 | 464) 501] 496] 622] 323 342 
DO. so-so ae eees 0 0 0 0 32 | 445 | 439 | 589] 248 | 745 | 219 239 
Mayyiiisehotkiteus aetre ass Se 0 57 | 270} 265 | 367] 335] 420] 354] 364] 330] 195 67 
Mey LO Se ree oo 3 sneer (4) 460 | 757 | 766] 805) 730] 808| 714| 647} 615) 467 635 
1 The eggs laid on this day are included with those recorded under the following day. 
