THE LONE STAR TICK. 145 
TasLe LVIII.—Oviposition of Amblyomma americanum—Continued. 
Number of eggs deposited—days following dropping. Total 
Date engorged female a Se ee ee ee ee ee ae eee ee eee 
drop na ber of 
18 19 20 21 22 23 24 25 | 26 | 27 / 28 | eggs. 
1906. si / 
TM eS eee eae 212} 132] 112 70 US Ge ees PE A a ee 2,882 
te ye ESE ate eee ee 0 0 27 Up) Sa", SES Bee Bees, ee” ees 0 at el (eee 2,508 
oe cae Ea | 148] 129 0 Oo 8 Se aad, AINE aS a Wil 4,590 
Li Lot {2 Ee ee 14 0 0 if ie ie! Sepa eee Pape meee eee Bas Vee Bae 2,659 
_. een pate enema 25| 17 6 3 St 5c CG ERG SONNY Salts UES 1,736 
haters 2 0 <% eei22s, 3 J) 0 0 0 UE RS UR) Sa ee ee es aS Bee ed 947 
5 eS ee te SE Bee ee 25 20 16 5 2 yess Shee. ee! oa Ae 1,510 
i. ee So Sere eee ee 6 10 0 OU [iia 32k el PBS pale? ERED 1,306 
1908. | | 
1 eee eee 196} 103} 106 90 19 0.) -Deadt: he. 1 2s} e- | 3,751 
Phe ER et 162| 54 2 i) 0 ag ee i eae clon he fe Bisel 3,174 
_ Se ae 74| 67] 7 5 0 ee ee OSs es tiem 3,249 
LT gt See eee eee 186 | 203; 153) 100 76 58 51 | 38 | 25 | 22; 14) 8,330 
‘eS ae eo a ones ENS ges ae Rae eee | 3,053. 
The minimum incubation period recorded occurred in the labora- 
tory in June and July at a mean temperature of 80.5° F. This 
period was 23 days, while out of doors in July and August, at a mean 
temperature of 82.5° F., 32 days passed before hatching commenced. 
The total effective temperature required for embryonic development 
appears to be 862° F. 
TaBLE LIX.—Preoviposition, incubation, and larval longevity of Amblyomma 
americanum. 
| | 
Temperature during 
| incubation. 
Mini- 
Date en- 
or E Hatching | um jf Larval Total 
emale | deposited. began. ncn: | All larve dead. Dacely aveleee 
p ied Maxi-| Mini-| age | tive 
mum.}mum.| daily | tem- 
mean.) pera- 
ture. 
1906. Days 1906 Days OF Were ee oe 
May 28, 29...| Before 
Joly ic5 {2- S| RW hs ld ro ee eee 1 i |) Pe Pere rk aia | Wale 
May 30, 31...| July 1 or 
before... .- See APRN aches seers ners Sea Bah to =e ee os A ee 
1907. 1907. 1907. | 
Mar. 30..| Apr. 12......| June 13...... ol Bree I Ge Seema DALI Ria Aad oat 
June 18..| June 25...... July 22...... he ape Re Wek BES ene Te 3 
1908. 1908. 1908. 
May 14, 18...) June 11...... 29 | Sept. 30—-Oct. 7........ 110-115 | 89.0 65 | 78.5 | 1,028 
May 19-27. June 15 7 OS ti | 123-131 | 91.5 68 | 79.7 | 1,018 
May 27-29...| June 21.... 26 | Before Sept. 24........ 95 | 91.5 69 | 80.4 972 
= Peat June 24 26 | Sept. 30-Oct. 7......--. 98-105 | 91.5 69 } 81 986 
a -_ 
June: 3... cue Pi Geen eee oe , 91 | 91.5 69 | 81.2 | 1,019 
June 4-6.... | June 29..... 26 | ‘Oot. 26. 5.0... eee 119 | 91.5 69 | 80.8 983 
1909. 1909. 1909. ! 1909. 
June 4...| June 10......| July 4...... Beat ere eee ee eee a ea leas ca dad 91.0 69 | 80.2 930 
June 11......| July 3....... 23.| Sept. 2-15............. 6l— 74 | 91.0 70 | 80.5 862 
June 9.......| July 3......-. 25 | Aug. 20-Sept. 2........| 48- 61 | 91.0 69 | 80.3 932 
June 9.../ June 15......| July 9....... 25 | Sept. 4-16.........-.-. 57- 68 | 90.0 71 | Sl 950 
1910. 1910. 
Sept. 27..| Oct. 11...... wont Pac ce ke 109 | May 20-July 16........ 113-170 | 87.0 17 7.1 | 1,908 
ek. 2. ..| Oct. 14...*.. i a GOR eS 117 | July 16-Aug. 2........ 159-176 | 87.0 17 | 56 1,949 
1908. 1908. 1909. 
0 July 14... Agr Task 1S 279 | 97.5 60 | 82.3 | 1,256 
1) wuly 16°... *. AG 10-.* 32 | Jan. 28—Feb. 8......... 196-207 | 97.5 60 | 82.5 | 1,262 
@) eal yi7...... Are VT 2 32 | Dec. 24 (1908)-Jan. 23 .| 160-190 | 97.5 60 | 82.5 | 1,264 
1 Records made out of doors. 
21448°—Bull. 106—12——-10 
