THE SPINOSE EAR TICK. 67 
TaBLeE XII.—The parasitic period of development of Ornithodoros megnini on a bovine. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
1908. 
1908. 
INFESTATION No. 1. 
Aug. 31,2p.m. Larve placed in ears. 
Sept. 8,9a.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). 
Nov. 18 (78th day). Onenymph dropped (7 by 4 by 2.5mm.), molted to a male 13 days later (Dec. 1). 
Mar. 13 (195th day). One nymph dropped. 
Mar. 27 (209th day). The remaining nymphs (3) dropped. These were probably affected by spray- 
ing of the host Mar. 26. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
1907. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1908. 
1909. 
1909. 
1909. 
1909. 
1909. 
INFESTATION No. 2. 
Oct. 13, 1la.m. Larvee 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. 
Noy. 4 (22d day). One nymph was removed, molted (Noy. 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, 4p. m. (7th day). Two molted. 
Apr. 15 (8th day). All molted. 
Apr. 24. Three removed. 
May 8 (81st day). One nymph dropped (7 by 4 by 2 mm.). 
May 13 (36th day). One nymph dropped (7.5 by 5 by 3 mm.). 
May 17 (40th day). One nymph dropped (7 by 4.5 by 3 mm.). 
June 17 (71ist day). Four nymphs dropped. 
June 22-29 (76th-83d day). Two nymphs dropped. 
Aug. 7 (121st day). Two nymphs dropped (7 by 4.5 by 2.5 mm; & by 5 by 3mm.). 
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. Larve 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 (89th 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. Larvez 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. 
