THE SPINOSE EAR TICK. 67 
Taste XII.—The parasitic period of development of Ornithodoros megnini on a bovine. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
INFESTATION No. 1. 
Aug. 31,2p.m. Larve placed in ears. 
Sept. 8, 9 a.m. (8th day). Several molted. 
Sept. 9,9a.m. (9th day). All molted. 
Oct. 4 (34th day). One nymph dropped, molted to a male 11 days later (Oct. 15). 
Oct. 15 (45th day). One nymph dropped, molted to a male 13 days later (Oct. 28). 
Nov. 5 (65th day). One nymph dropped. 
Nov. 8 (62th day). One nymph dropped (8 by 5 by 3mm.), molted to a male 31 days later (Dec. 9). 
1907. Nov. 18(78thday). Onenymph dropped (7 by 4 by 2.5mm.), molted to a male 13 days later (Dec. 1). 
1908. 
Mar. 13 (195th day). One nymph dropped. 
1908. Mar. 27 (209th day). The remaining nymphs (3) dropped. These were probably atfiected by spray- 
in 
1907 
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g of the host Mar. 26. 
INFESTATION No. 2. 
. Oct. 13, 11a.m. Larve placed in ear. 
. Oct. 21, 9a. m. (8th day). One molted. 
. Oct. 23 (10th day). All but two or three molted. 
. Oct. 25 (12th day). All molted. 
. Nov. 4 (22d day). One nymph was removed, molted (Nov. 28) 24 days later. 
. Dec. 3 (51st day). One nymph dropped. 
. Dec. 4 (52d day). Two nymphs dropped. 
. Dec. 5 (53d day).. Two nymphs dropped. 
. Dec. 23 (70th day). One nymph dropped. 
. Dec. 24 (71st day). One nymph dropped. 
. Jan. 14 (93d day). The last nymph dropped (dead). 
INFESTATION NO. 3. 
. Apr.7,9a.m. Larvee placed in ear. 
. Apr. 14,4 p.m. (7th day). Two molted. 
1908. Apr. 15 (8th day). All molted. 
1908. Apr. 24. Three removed. 
1908. May 8 (31st day). One nymph dropped (7 by 4 by 2 mm.). 
1908. May 13 (36th day). One nymph dropped (7.5 by 5 by 3 mm.). 
1908. May 17 (40th day). One nymph dropped (7 by 4.5 by 3 mm.). 
1908. June 17 (7ist day). Four nymphs dropped. 
1908. June 22-29 (76th-83d day). Two nymphs dropped. 
1908. Aug. 7 (121st day). Two nymphs dropped (7 by 4.5 by 2.5 mm; & by 5 by 3 mm.). 
1908. Aug. 11 (124th day). One nymph removed (7 by 4.5 by 2.5 mm.). 
. Sept. 8 (154th day). One nymph dropped (7 by 4.5 by 3 mm.). 
. Sept. 24 (170th day). One nymph dropped. 
. Oct. 2 (178th day). One nymph dropped during process of spraying host. 
INFESTATION No. 4. 
. July 2. Larvee placed in ear. 
. July 12 (10th day). Several molted. 
. July 14 (12th day). All molted. 
. Aug. 26 (24th day). Cotton-seed oil poured into ear, but none dropped. 
. Aug. 31 (29th day). One dead (in bag), 5 attached. 
. Sept. 10 (39th day). Chloronaphtholeum (1 to 75) poured into ear but none dropped 
. Sept. 24 (53d day). One nymph dropped. , 
. Oct. 10 (67th day). One nymph dropped. 
. Oct. 12 (69th day). Three nymphs still present. 
INFESTATION No. 5. 
. June 10. Larvee placed in ears. 
. July 18 (8th day). Two molted. 
. July 19 (9th day). Two molted. 
. Aug. 6 (57th day). First nymph dropped. 
. Oct. 1 (113th day). Last two nymphs dropped. 
