108 LIFE HISTORY OF NORTH AMERICAN TICKS. 
TABLE XXXV.— Molting of engorged nymphs of Rhipicephalus sanguineus. 
[¢=Male. 9=Female.] 
Engorged nymphs molted—days following dropping. 
Date engorged Num- Sarna 
nymphs dropped. Host. ber 
12) 13) 14 | 15 | 16 | 17 | 18 | 19 | 20 | 23 |:26 | 27 | 29° )/538'/'56 
Septs.22, 19072 5--.--. Dogeta.s PG ce) ceer|| Gees eee qepa|beee| Pos ee Bee Pee eee eee) 
Octs27, 1907. 322 sce =|5c- GOs2o-5 1 3 PE Bol Mage Seal |sone Be ees aes eee WO toons al eee ee 
Nov. a A007. oee Bovine.. 6 Jal eee MSse cea) - tae esas otislisee =\ihs lle eS emis) oes ale sere Cee eee ee 
Nov. 12, 1907-........].-.do ar CN Rae ees eed] hi EG EE ae Ag EDA aM ae ate WE ws) 1 
Apr. 22, 1908 1........| Dog..... 1 RS Aa el e558 eto) et 2 peal S26 | Shale evel) OYA ile da eee 
ifvibr daly Ale, eRe Bovine.. ah | a bces| aWen BSS cee Ol Sretate | sjeterall aes are ogee 8 are (Pan : 
July 18, 1908....... Daa 2 to 162 39 33h SADE aS ae ea 
5d} 18 
July 19, 1908......... P dow. 2. 15 | 291045] a0 fee[nn-[eeeefeeee| ee efeeee eee fee ee fee eden ees 
July 20, 1908........- pe ad0! eee By ee en Ss Sool ate Wo lessees. |S Se 
July 21, 190855... ee00e5-5 2 3 Ol aC eal ee eal emaeliomiee eee ene 
Aug. 17, 19082....... Dog..... 100 role S hes 43 38 Lie ee 
3 [33] 28 bai fel ae 1g 
Aug. 18, 19083....... iy 100 |..../8 3) 251 SS Mois) 38] rS|tal.---]----]---- a 
Nov. 29, 1909.........]...do..... iy) ep Pam OS al S| (ame Ey Ew Ee zublag Tek Melee 
Total. ODN |i FPR See pet ge Loe a : 
Temperature from 
Engorged nymphs molted— Number 
days following dropping. molted. nt tc first 
Date éngorged Num- i 
nymphs dropped. HOST: ber. : : 3 
| | 
; 3 
57 | 58 |59|73|122|125/197/100 | S| .| g | g Be 
a i= | 5 
a) ° sS * > 
reeset Mest | asst a < 
ae a 2 2) 
Sept. 22, 1907.....| Dog..... rly sae pete, RS (SN. Piet 3 ae aes 1) 1) 20 oe ee 
Oct. 27, 1907... Shae Pee yates ily Bee e Soa pel ee Mar aaa baal ieee Dsl) | S| be oe eee 
Nov. 11, 1907....- Bovine Di LO) Baleee ses] see seaciles = 1 Lally (2:98 nen eet eee 
INOv.42)19072---4|-22 dor. Gi VO a ONO} Cee rere seers ue AL |" 16 ile 2 5c A eta eee|| Seroeeee 
Apr. 22, 19081....; Dog....- LL ger eee Bee PSS bee eso heel Pere eee eB eee 11] 86.0] 47.0} 70.39 
July 17, 1908....-- Bovine.. Byles |Seee Per Per oat solMeolsen 2 1] 3] 95.0] 76.5] 84.65 
July 18, 1908......|.--do....- 10) (5 ee eS Bes Eee ee see) Pel Ree era) 4/10] 95.0] 76.5 | 84.70 
uby219; 19082... | -.00.=. 2 WOR aaa) eee Bel ea et eae sel echo 6 8| 14] 95.0] 76.5] 84.69 
Tuly 20, 1908. ..2:.|...d0..2.2 Fil epee ae Se ial eae iC llea eS 1) 4] 95.0] 76.5] 84.92 
Duly 21; 1908s bee doles Ch) eo Be este | eat) eel reer See ee 0 2| 2) 95.0). 77.0°| 85.42 
Aug. 17, 1908 2....]| Dog...-- LOOM Soca beea|mct |e aralceel eee setal sealed 40 | 67 | 96.0} 75.5] 83.90 
Awe. 18, 19083. .-_ |: do...... LOOM Ee | 22 | ee ge (eed ere) beter |) 33 | 53] 93.0) 75.5] 83.55 
Nov. 29, 1909.....|.-- GOs--<5 CYS ee pene (ora Meme 75 0) UR Se | Fake ae Sr 17 | 92.0} 20.0:| 55.97 
Total BPA eel lee 67 96°19} |... 222 -|asbeses| see 
1 Collected at Brownsville, Tex. 
2 Collected at Brownsville, Tex.; 27 of these nymphs were parasitized. 
3 Collected at Corpus Christi, Tex.; 40 of these nymphs were parasitized. 
The adult (Table XXX VI).—Of 163 adults which were observed to 
molt from nymphs, 96, or 58.9 per cent, were females. The greatest 
adult longevity observed by us was between 204 and 214 days. This 
record was made on alot of 13 males and 15 females which molted from 
nymphs September 1, 1908, and were kept in a tube on moist sand in 
the laboratory. On March 24, 1909, or after 204 days, a male and a 
female were alive. These were both dead on April 3, 1909. Other 
specimens which became adult in early September were found to live 
nearly as long as the lot above referred to. Several lots of ticks 
