色々なアクセスがあるようです。検索ロボットでしょうか。クローラー。
http://help.yahoo.com/help/us/ysearch/slurp
http://flipboard.com/browserproxy
http://www.crowsnest.tv/
http://www.google.com/bot.html

その他・・・phpのsetup.phpにアクセスしようとする動きが。phpMyAdminの脆弱性を狙った攻撃との事。
狙われることを予想し、不要な機能を絞っています。
164.115.24.121 – – [02/Jun/2015:02:51:22 +0900] “GET /phpMyAdmin/scripts/setup.php HTTP/1.1” 404 226 “-” “-”
164.115.24.121 – – [02/Jun/2015:02:51:26 +0900] “GET /pma/scripts/setup.php HTTP/1.1” 404 219 “-” “-”
164.115.24.121 – – [02/Jun/2015:02:51:29 +0900] “GET /myadmin/scripts/setup.php HTTP/1.1” 404 223 “-” “-”

218.188.209.164 – – [29/May/2015:10:41:31 +0900] “GET /phpMyAdmin/scripts/setup.php HTTP/1.1” 404 226 “-” “-”
218.188.209.164 – – [29/May/2015:10:41:35 +0900] “GET /pma/scripts/setup.php HTTP/1.1” 404 219 “-” “-”
218.188.209.164 – – [29/May/2015:10:41:38 +0900] “GET /myadmin/scripts/setup.php HTTP/1.1” 404 223 “-” “-”

114.119.4.47 – – [29/May/2015:14:44:37 +0900] “GET /phpMyAdmin/scripts/setup.php HTTP/1.1” 404 226 “-” “-”
114.119.4.47 – – [29/May/2015:14:44:40 +0900] “GET /pma/scripts/setup.php HTTP/1.1” 404 219 “-” “-”
114.119.4.47 – – [29/May/2015:14:44:44 +0900] “GET /myadmin/scripts/setup.php HTTP/1.1” 404 223 “-” “-”

176.31.208.220 – – [31/May/2015:02:53:58 +0900] “GET /phpMyAdmin/scripts/setup.php HTTP/1.1” 404 226 “-” “-”
176.31.208.220 – – [31/May/2015:02:54:01 +0900] “GET /pma/scripts/setup.php HTTP/1.1” 404 219 “-” “-”
176.31.208.220 – – [31/May/2015:02:54:05 +0900] “GET /myadmin/scripts/setup.php HTTP/1.1” 404 223 “-” “-”
などなど。怖いですね。