. New Mallophaga, 3. Comprising: Mallophaga from birds of Panama, Baja California and Alaska . Ki« 2 152 CALIFORNIA ACADEMY OF Fig. 3. always either approaching each other or are recedingfrom each other. The prothoracic legs donot move synchronouslywith either of the otherpairs nor with each ( fig. 3 ) onemoves backwards whilethe other is reaching for-ward. They appear mainlyto guide the body. Thefemoro-tibial joint is mostof the time in front of thetarsal claws, so that theirpower as propellers cannotbe great. The parasitethus progresses along the feather with a han
. New Mallophaga, 3. Comprising: Mallophaga from birds of Panama, Baja California and Alaska . Ki« 2 152 CALIFORNIA ACADEMY OF Fig. 3. always either approaching each other or are recedingfrom each other. The prothoracic legs donot move synchronouslywith either of the otherpairs nor with each ( fig. 3 ) onemoves backwards whilethe other is reaching for-ward. They appear mainlyto guide the body. Thefemoro-tibial joint is mostof the time in front of thetarsal claws, so that theirpower as propellers cannotbe great. The parasitethus progresses along the feather with a hand over hand movement of the pro-thoracic legs, as of a man climbing a rope, while theother legs, a pair at a time, are continually pushing thebody forward. This is the typical movement of the legs and the onewhich prevails when the insects are walking quietlyand regularly, but at times it becomes very muchobscured by irregular movements and is generally moreor less so, so that almost any relative position of thelegs may be seen. The outer end of the metathoracicfemur is seldom brought much farther forward thanits coxa. The mesothor
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Keywords: ., bookcentury1800, bookdecade1890, bookidnewmallophaga3co00kelluof
