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 ; antennae and tarsi testaceous ; 

 wings pale fulvous. 



ATHALIA CENTIFOLI<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 PL 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, (PL 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 dug 

 or caterpillar, negro or nigger. 



Full descriptions and history of this insect, which 

 it is desirable should be well known in order that 

 some remedy may be devised against its depredations, 

 will be found in Mr. Yarrell's paper in the second 



