140 The Scottish Naturalist. 



streak acutely toothed below beyond the middle, and an oblong 

 white spot at its extremity, pearly-white. Hind line silvery. 

 H.-w. grey. 9^-10^ Z. 



June, July. Central and Northern Europe. Somewhat local in Britain. 

 In Scotland it has been noticed at Musselburgh, Itannoch, Strathglass, and 

 Braemar. 



Note. — These three species are very like, but may be distinguished : — uligino- 

 stilus, by the fissured central streak and^«/e hind-wiugs ; pratellus by the dull 

 white and narrow sub-costal and central streaks ; and dumetellus by its rather 

 longer wings, short sub-costal streak, and shining white and broader central 

 streak. 



B. — F.-w. not emarginate, obtuse, often roith the veins con- 

 spicuous. Cilia metallic. No central streak. Hind line slightly arched. 



a) Chrysoteucnia H.— F.-w. veins more or less conspi- 

 cuous. Hind-margin yelloicish, with black spots. 



HORTTJELLUS H.— F.-w. ochreous, lined with fuscous be- 

 tween the veins. Hind line obtusely angulated, silvery blue 

 margined with yellowish brown. A short silvery blue line before 

 the tip. Cilia shining metallic. The brown angulated central 

 line (not mentioned by Zeller or Herrich-Shaffer) is often pre- 

 sent. 10-ioJ^ Z. 



a. Var. cespitelhis H. — F.-w. ochreous, not fuscous, between 

 the veins. 



b. Ab. fuscescentdlus. — F.-w. altogether fuscous. 



June, July. Central and Northern Europe. Common throughout Britain. 

 a. Switzerland, &c. b. " More frequent in England, '' — Zeller. 



In many Scottish examples the hind and apical lines are pale silvery, and the 

 marginal spots faintly brown. 



b) Thysanota H — F.-w. veins more or less conspicuous. 

 Both lines present. Hind-margin scarcely punctured. 



CRATERELLUS Sc. (1763); rorella L. (1767). — Head ferru- 

 ginous j palpi very long. F.-w. broad, yellowish-white, lined 

 with brown between the veins. Lines brown, the hind one 

 margined with whitish. A small brown double line below the 

 tip. Cilia shining metallic. 9^-10 L. 



Var. Cassentiniellus Z. — Palpi longer. F.-w. Central line thick- 

 ened. Apical line single. Eight brown streaks between the hind 

 line and hind-margin (in craterellus there are said to be nine). 

 10-11 Z. 



