356 I.EPIDOPTERA. 



Genus 8. ANTITHESIA. 



Antennas thick, simple ; palpi short, middle joint long and 

 thick, apical joint very small ; thorax robust, crested at the 

 back ; abdomen slender with small dorsal tufts. Fore wings 

 without a fold ; distinctly elongated, broad, markings indis- 

 tinct, costal and dorsal regions strongly contrasted in colour ; 

 hind wings with a tuft of hair scales on the median nervure. 



We have but one species. 



1. A. salicella. L. — Expanse J to | inch (18-22 mm.). 

 Fore wings long, somewhat squared ; without definite mark- 

 ings ; costal region black, mottled with brown and blue ; 

 dorsal region white. 



Antenn£e thick, notched, light brown, ashy-grey at the 

 back ; palj^i small, white ; head black and white mixed ; 

 thorax white spotted and dotted with black; abdomen grey- 

 white. Fore wings elongate, squared and very blunt ; costa 

 flatly arched ; apex squarely angulated ; hind margin per- 

 pendicular, then gently curved oft'; basal and dorsal area 

 broadly white, dusted with brown ; costal and hinder area 

 marbled with brown-black and blue-black ; the middle area 

 white dusted with black, and having not far from the base a 

 wedge-shaped black point from the dark, running into the 

 white, area; at the base of the dorsal margin is a deep black 

 spot, and another lies at the anal angle ; cilia brown-black. 

 Hind wings large, and, with their cilia, smoky black. Female 

 similar. 



On the wing in June, July, and August, in a single 

 generation. 



JjARVA active, stoutest in the middle ; dull red-brown ; 

 head small, heart-shaped, black and shining ; dorsal plate 

 black, dull brown in front ; anal plate large, round, rough, 

 black ; raised dots shining black ; legs dull brown, bases of 

 the joints black. (Wilkinson.) 



