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The Pamphlet Collection of Sir Robert Stout: Volume 6

Crinia

page 59

Crinia.

C. verrucosa. Australia.

C. georgiana. King George's Sound.

C. affinis. West coast.

C. tasmaniensis. Tasmania.

C. lævis. Tasmania.

C. fasciata. East and West coast.

These are small species, about an inch in length; they inhabit swamps and shallow pools, have all their toes free, and are destitute of large glands. Nearly all have a series of tubercles on the back, and are spotted with bright pink or orange on the inner side of the hind legs. A fly often deposits her eggs behind the tympanum, or on the back of these little frogs, and we have several times noticed single individuals infested with four such larvæ. When the larva has reached maturity it drops out and the frog dies. The result of the usual transformation of the insect is a small yellow fly, to which the late W. S. Macleay has given the name of Batrachyomia.

We have subsequently ascertained that the same parasite infests other Australian frogs.