115 



The perfect insect appears in January, February, 

 March, and April, and also in September. 



The caterpillar is greyish-brown, spotted with orange 

 marks and raised dots. 



It feeds on the elm and the oak. 



The chrysalis is found under the ground. 



HISTON H1KTAK1A. 



BRINDLED HEAVTY. 



Plate XIX. Figure 7. 



THIS insect measures one inch and three quarters or 

 a little over in extent. 



Male: fore wings greenish grey-brown, the first line 

 darker and widely shaded, the second of a similar colour 

 enclosing a central line which runs through the central 

 spot which is dark brown, but sometimes wanting. Hind 

 wings paler but otherwise similar, with a few dark marks 

 running in from the inner edge, and a dark central spot. 

 The antennae are feathered but not quite to the tip. 



Female: fore wings more transparent, the lines often 

 almost wanting. Hind wings also paler and more trans- 

 parent and with more or less of a dull yellow tinge, and 

 traces of two lines across. 



Localities for this species are Scarborough, Falmouth, 

 Canterbury, Cambridge, Kingsbury, Stowmarket, Exeter, 

 and London. 



The perfect insect appears in April. 



The caterpillar, which is very variable, is of a general 

 greenish-brown colour, with a pale yellow interrupted line 



