Dr. Leach having characterized this genus several years 

 since, his name has been adopted. I have excluded two 

 species of Treitschke's group, in consequence of the antennae 

 being simple in both sexes ; one, P. Thipniaria^ has been 

 already attached to my genus Macaria; and the other, P. viri- 

 data, Linn, probably belongs to the same group. 

 The following are British insects. 



1. H. putatarius Linn. Hww. — Hiib. pi. 2. Jl 10. — End of 



May ; open places in woods. The G. j^irugmaria, 

 Hiib. 9. 4-6, appears to me to be the same insect faded, 

 and my specimens agree better with it than with the 

 former, excepting in size. 



2. H. vernarius Liim. — Hub. 2. 7. — lucidata Do7i. 3. 97. — vo- 



lutaria Haw. — End of July ; chalky places, birch- 

 wood, &c. 



3. H. Smaragdarius Fab. — Hiih. 1. 1, represents the female 



which Godart has copied ; and in these figures there 

 is a white line round the inferior wings, which was 

 not visible on the upper sides of the specimen re- 

 presented in our Plate. For the loan of this rare 

 insect, which is unique as British, I am indebted to 

 Mr. C. Parsons, of the Lawn, Southchurch, Essex. 

 Mr. Parsons found the caterpillar in that neighbour- 

 hood, and the moth was hatched the 30th June, 1826. 



4. H. papilionaria Linn. — Hiib. 2. 6. — Don. 8. 287. 1. Haio. 



— End of July ; in woods and the vicinity of alders, 

 meadows. 



5. H. Cythisaria Hiib. pi. \. f. 2. — prasinaria Fab. Haw. — 



Genistaria Goda. pi. 152. 2. — Beginning of July; 

 grassy places. This insect, as well as most of the other 

 species, frequently fade very much by keeping ; it is 

 therefore possible that the G. coronillaria of Hiib- 

 ner, tab. 93, may be only a gray variety, but it has 

 never been observed in this country. 



6. H. Bajularia Hiib. 1. 3. — Goda. — ditaria Fab. — Don. 6. 



202. 1. — June and July; open parts in woods, at 

 Birch-wood, Kent, &c. 



7. H. Prunaria Linn. Haw. — Sepp. v. 2. pi. 8 & 9. — Don. 



1. 21. and v. 9. 293. 3 var. — Corylaria Esp. var. — 



End of June ; shady groves and skirts of woods, Kent, 



Norfolk, &c. 



The last two insects depart from the other species in some 



respects, but it is better to include them here than to make 



new genera for them. 



The plant is Oxalis acetosella (Wood Sorrel). 



