312 
SYSTEMATIC ARRANGEMENT 
with a greenish-yellow spot on each side, the three 
intermediate joints of the same colour with violet- 
black in the centre ; antennse and tarsi testaceous ; 
wings pale fulvous. 
ATHALIA CENTIFOLL/E. 
Plate XXX. Fig. 3. Fig. 4, Caterpillar. 
This is the Turnip saw-fly, which has occasioned 
so much loss to agriculturists within the last few 
years. It is about four lines in length, the figure 
on PI. XXX. being considerably magnified in order 
to show the parts more distinctly. The general 
colour is bright orange yellow ; antennae and head 
black, the underside of the former dull yellow; 
palpi yellow ; thorax black, the collar, a triangular 
spot in front and sometimes one behind, reddish- 
orange ; abdomen and legs reddish -yellow, the tips 
of all the tarsal joints and of the tibiae black ; wings 
yellowish at the base, the costa and stigma dark- 
brown. The caterpillar, (PI. XXX. fig. 4,) has six 
pectoral, fourteen abdominal, and two anal feet. It 
is of a dull slate or greyish-black colour, with a 
somewhat lighter line along the sides just above the 
feet. It is known in different parts of the country 
by the names of black palmer , black canker , black slug 
or caterpillar , negro or nigger . 
Full descriptions and history of this insect, which 
it is desirable should be well known in order that 
6ome remedy may be devised against its depredations, 
will be found in Mr. Y arrell's paper in the second 
