90 
Mallophaga 
Sub-genus Parricola, nov. 
Species from the Parridae have the same general facies as those 
from rails, but are distinctly more slender forms, with little difierence 
in size between the sexes, the (J being only very slightly smaller than 
the The transverse abdominal bands of the d are entire; of the 
? divided by a narrow uncoloured line. Type, RaUicola {Parricola) 
sulcata, Piaget. 
Sub-genus Aptericola, nov. 
Distinguished from the two previous subdivisions by its more robust 
form. The space immediately behind the signature is closed, except 
for a narrow median interruption, by two coloured bands, leaving two 
roughly semicircular clear areas in front of the mandibles. The d is 
somewhat smaller than the $. The transverse bands of the abdomen 
are entire in both sexes. Type, RaUicola {Aptericola) gadowi, Harrison. 
The following key will serve to differentiate these sub-genera: 
A. Uncoloured area in front of mandibles in two 
semicircular patches, not reaching hind 
border of signature .. 
A A. Uncoloured area of usual shape, and extending 
to signature 
B. Slender forms, deeply coloured, sexes of equal 
S1Z0 •• •• •• •• •• 
BB. Broader forms, not usually deeply coloured, d 
markedly smaller than $ 
Aptericola. 
B. 
Parricola. 
RaUicola s. str. 
RaUicola {Aptericola) gadowi, n. sp. 
As it is not likely that more than one, or at most two, further species 
will be found in this subdivision, I dispense with the long description 
which is usually the only safe course in deahng with Mallophaga, and 
merely emphasise the differences between the three species here de¬ 
scribed. This, with the help of the figures, will render the species easy of 
recognition. 
The general form of the d will be apparent from Fig. 1. It differs 
from the ^ oi A. novae-zealandiae next described in its more robust 
form, and in the flat clypeal front, with broadly rounded angles, as 
well as in the longer parameres and shorter median portion of the genital 
apparatus, which has a wider and shorter basal plate. The features of the 
chaetotaxy, which would appear to be characteristic for the subdivision, 
are the three pairs of hairs upon the metathoracic border, and the 
