THE LONE STAR TICK. 
145 
Taste LVIII.—Oviposition of Amblyomma americanum—Continued. 
Number of eggs deposited—days following dropping. Total 
Date engorged female num- 
dropped. ber of 
18 19 20 21 22 23 24 25 | 26 | 27 | 28 | eggs. 
1906. 
EAT Oat B/S Se ne eae a a ee 212} 132] 112 70 One Deadh ies acases 2,882 
Balboa ree SS ace 0 0 On) 27, OIE cers Cams| Neon os 2,508 
LOC 5 a ea cee 148 | 129 0 Oileead: || secede )onccce oe 4,590 
ID NSe ee ee ree 14 0 0 One ROSS sates ssa 2522 Alseeioned 2,659 
TD Ye pst ee le DAG Da || aly 6 3 0 Ty | ees 1, 736 
1D XR ae oe ee 0 0 0 Obl Dead: |etss5erelh 8 947 
WG osc sec ee eae ee 25 20 16 5 2 (Ul Ses pats 1,510 
1D Sent eee eee 6 10 0 One wDeads|peas- 22) 5 cea! 1,306 
1908. 
MUR) Oset ines ano nase eee 196 | 103] 106 90 19 Oe Dead | ele cecal ele ee 3,751 
DO rcecc eee etee 162 54 2 0 0 OM SS CObS ery | haces tena oe 3,174 
NEN Ci aes es a EW ee FE 5 0 On Beedoses Sere |Ere aii S| Remnl eatong 
cay Omnia Semen re oe BE ee 186 | 203} 153] 100 76 58 51 | 38 | 25 | 22 | 14 8, 330 
PAVIOTAD Os soe cers oo sand DSSS) SSCS SE ARSE rb ease [a ecacciei) bn Pa eee te ear ees (ear 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 L1X.—Preoviposition, incubation, and larval longevity of Amblyomma 
americanum. 
Temperature during 
incubation. 
Mini- 
Date en- 
: Larval 
orged Eggs Hatching | Um : Total 
emale | deposited. began. side All larvee dead. car Aver-| effec- 
dropped. ea BevILY- /Maxi-| Mini-| age | tive 
Iu mum./mum.| daily | tem- 
mean.| pera- 
ture. 
1906. Days 1906 Days. | °F a ee ey IN OE 
May 28, 29...| Before 
JUL yee BAUMIN OV 2a eee oacle a s Oh Reel eee ems a | ee 2 
May 30, 31...] July 1 or 
before... .. Ble O Mise fey tree ee ete 150) | Sete enc acel| aes. eee 
1907. 1907. 1907. 
Mar. 30..| Apr. 12...... June 13.....- A EEE MCI ern iera hain eS ae Rope eee Re ema) me, MRICS A 
June 18..) June 25......| July 22...... PBN Meek eB Mae eee eee| se een Ae S| behe Rane aN re 
1908. 1908. 1908. 
May 14, 18...] June 11...... 29) | Sept: s0=Oct) 7..--.--- 110-115 | 89.0 65 | 78.5 | 1,028 
May 19-27...| June 15..._.. 28 \NOCES 16-24" ioe. eee 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 
May BO vesees June 24...... 26 | Sept. 30-Oct. 7........ 98-105 | 91.5 69 | 81 986 
a 31- 
JUNO) oSzec a: June 26.....- ol STE) oh Ai A iE 91 | 91.5 69 | 81.2 | 1,019 
June 4-6.... | June 29..... Zp OCs 26h. vaso aaeeos 2 119 | 91.5 69 | 80.8 983 
1909. 1909. 1909. 1909. 
June 4...| June 10......| July 4...... yal Eee ee Peek ee a a em (ee 91.0 69 | 80.2 930 
June 11.... July3: s.- 23) SED. Polo es eene eae 61- 74 | 91.0 70 | 80.5 862 
June 9....... Salva ase st 25 | Aug. 20-Sept. 2........| 48- 61 | 91.0 69 | 80.3 93 
June 9... June 15...... JulysOe see) 25 S@pt. 4-15 os. c cece ck 57- 68 | 90.0 71 | 81 950 
1910. 1910. 
Sept.27../ Oct. 11...... Jan, Qe see 109 | May 20-July 16........ 113-170 | 87.0 17 | 57.1 | 1,908 
Oct. 2: -2| Oct: 14... 42 Feb. 7... 117 | July 16-Aug. 2........ 159-176 | 87.0 17 | 56 1,949 
1908. 1908. 1909. 
(1) sly: 1450 Aug. 14..... 5 HG IS 9) le eee eae Ae he 279 | 97.5 60 | 82.3 | 1,256 
(@) July 16...... ALE GS A. 2 32 | Jan. 28-Feb. 8......... 196-207 | 97.5 60 | 82.5 | 1,262 
Q) Tul yalyen sss TRE eee 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 
