Entomological Society. 3471 



19. P. Ericetorum, Z. Appears in July and August. Zeller supposes the larva 

 feeds on Hieracium Pilosella. 



21. P. obscurus, Z. Dup. ; parvidactylus, Haw., Sta. ; microdactylus, St. Ap- 

 pears in June and July. The larva feeds on Hieracium Pilosella. 



24. P. phaodactylus, H., Z.,Sta.; lunaedactylus, Haw., St. Appears in July. 

 The larva feeds on several species of Ononis. Zeller remarks that it eats the flowers. 



26. P. mictodactylus, W. V., Z. Appears the end of May and in June. The 

 commonest Pterophorus near Glogau, where the larva feeds on Saxifraga granulata. 



32. P. graphodactylus, TV., Z. Freyer found the larva in June near Tegernsee 

 (Alps) on Gentiana lutea. 



33. P. fuscus, Retz., Z., Sta. ; fuscodactylus, Haw., St. The larva feeds on Ve- 

 ronica Chamaedrys (Stainton). 



36. P. lithodactylus, TV., Z., Sta. The larva feeds in June on Inula salicifolia 

 and I. dysenterica. 



38. P. Scarodactylus (H. ?), Z. The larva feeds on the flowers of Hieracium um- 

 bellatum and H. boreale in August and September. 



41. P. Inulae, Z. The larva lives in the flowers of Inula Britannica, feeds on the 

 unripe seeds, and is full grown at the end of July. Its presence may generally be 

 known by the disk of the flower having on it brown spots, or, at the part attacked being 

 pushed up into a small elevation. But such flowers are often inhabited only by larva3 

 of flies, and many flowers containing a larva of this Pterophorus do not exhibit these 

 marks. 



43. P. microdactylus, H., Z., Sta. Appears in May and July. The larva feeds 

 on the flowers of Eupatorium Cannabinum. 



44. P. osteodactylus, Z., Dup., Sta. The larva lives (probably) on Senecio nemo- 

 rensis. 



46. P. galactodactylus, H., Haw., St., Sta. The larva lives on Arctium Lappa in 

 May. 



47. P. Spilodactylus, Curt., St., Sta. Appears in July. The larva feeds on Mar- 

 rubium vulgare. 



51. P. tetradactylus, L., Haw., St. Appears in July and August. The larva 

 feeds on Thymus Serpyllum. 



52. P. Malacodactylus, Z. The long-haired larva feeds on Nepela Calamintha 

 and probably on other Labiatae. 



