2S4 LEPIDOPTERA. 



Family 3. HYDROCAMPID^. 



Legs very long and thin ; proboscis present ; maxillaiy 

 and labial palpi both slender, pushed forward ; vein 7 of the 

 fore wing arises from the discal cell ; upper side of the 

 median nervure of the hind wings devoid of long scales. 

 The species are all very slender and weak in structure. 



Genus 1. CATACLYSTA. 



Antennte threadlike, naked, ringed, bent near the base, 

 and upraised ; palpi slender, curled up ; thorax and abdomen 

 ver}^ thin ; fore wings trigonate, blunt, the discal cell short 

 and outwardly squared ; hind wings long, having a jewelled- 

 like edging behind ; legs very long and thin. Sexes differ- 

 ing in size and markings. 



We have but one species. 



1. C. lemnalis, Schiff.; lemnata, L. — Expanse of the 

 male g inch, of female § (15-23 mm.) All the wings of 

 the male glossy-white, with small black central dots and 

 faint lines ; of the female, fore wings larger and clouded 

 with brown, hind wings more distincth" lined ; in both sexes 

 having a jewelled blue-black hind marginal stripe. 



Antenna of the male long, slender, golden-brown, ringed 

 with white ; palpi small, slender, projecting from below, 

 white ; face smoothed down, white, as is the top of the head ; 

 thorax and abdomen very thin and weak, white. Fore wings 

 narrowly trigonate, very blunt behind ; costa gently arched ; 

 apex squarely angulated ; hind margin almost perpendicular 

 and very little curved ; colour porcelain-white ; the extreme 

 edge of the costa dark brown ; from it arise small, excessively 

 faint, similar clouds, from two of which proceed still fainter 

 yellowish lines, apparently suggesting the usual second and 

 subterminal lines ; discal spot a black dot ; hind margin 

 edged with yellow-brown ; cilia white, shaded in ]iart with 



