26 Lloyd's natural history 



Linn.), a species ver/ like the Light Arches in size and 

 appearance, but with much darker and more sharply defined 

 markings. The moths fly at dusk. 



THE LIGHT ARCHES. XYLENA LITHOXYLEA. 



Nodua lithoxyka, Fabricius, Mant. Ins. ii. p. 182, no. 299 



(1787). 

 Nodua sublustris, pt. Esper, Schmett. iv. (2) i. p. 408, Taf. 133, 



fig. I (nee fig. 2) (1790?). 

 Xylina lithoxyka^ Treitschke, Schmett. Eur. v. (3), p. 47 (1825), 



vi. (i), p. 412 (1827). 

 Xylophasia lithoxylea, Stephens, 111. Brit. Ent. Haust. ii. p. 175 



(1829); Kirby, Eur. Butterflies and Moths, p. 232 (1881); 



Buckler, Larvae of Brit. Lepid. iv. p. 52, pi. d^^, fig. i 



(1891). 



The Light Arches. 



This species measures fi.-om one inch and three-quarters to 

 two inches across the wings. It is common in Central Europe 

 and Western Asia. 



The head and neck are yellowish ashy-grey, the former with 

 two grey streaks. The thorax is grey with a slight crest, and 

 a dark longitudinal stripe. The abdomen is yellowish-grey, 

 whitish above, with dark dorsal tufts. There are also reddish- 

 grey lateral and anal tufts. The antennae are long, brown and 



