PETROICA. 
being similar to that of Kempia , being transferred to Tregellasia, which is 
not closely allied to the present series. 
Another instance of the absurdity of genus-lumping may be cited in the 
case of Charadrius, Mgialitis and Eudromias as recorded in the Ibis, July 
1915, p. 526. The genera, which should be called Pluvialis, Charadrius and 
Eudromias are very distinct and Charadrius is also divisible by anyone who 
makes a careful examination from a scientific view-point. When the osteology 
(or “deep-seated features” of lumpers) is examined the above-named “genera” 
are found to be well founded, and that the genus-splitter was warranted in 
determining these from his critical comparison of the essential features : this 
is continually true. 
