worthy of observation that, when resting, the E. tenax, and 

 probably the whole genus, heave their bodies up and down as 

 bees do, as if they were panting. 



The British species may be thus arranged. 



I. Wings naked. A. Seta of the antennae naked. 



a. Posterior tibiae simple. 



1. E. sepulchralis Linti. — tristis Panz. 82. 16 ? . 



On Flags at Hurne, Mr. Dale ; m. June, near Wareham ; 

 m. July, on flowers, sides of ditches, near Hull ; b. August, 

 salt-water meadows near Poole, J. C. 



2. E. ?ex\e\xsFab. — Panz.%2. 15.— Juneand July, on flowers at 



Torquay and Portland Ferry, Mr. Dale; m. April and 

 October, upon windows at Southchurch, Essex, J. C. 



4. E. cryptarum Fab. — Meig. 3. 389. 9. 



b. Posterior tibise dilated externally. 



5. E. apiformis Fall. — Meig. 390. 10. — Near London. 



6. E. Hortoruni Meig. 387. 6.— Near London. 



7. E. vulpinus Meg. — Meig. 388. 7. 



July, near Barnstaple, Mr. Dale ; August, Dover ; m. Oc- 

 tober, Isle of Wight, and Lowestoft, Suffolk, J. C. 



8. E. tenax Litm. — Don. 16. 2)1. 51^.— Panz. 14. 23 & 24. 

 From the early part of Spring nearly to Christmas, every- 

 where. So tenacious of life is the larva, that Linnaeus states, 

 the pressure of a paper-makers' press will scarcely destroy it. 



B. Seta of antennas pubescent or plumose. 



9. E. nubilipennis. — Cwt. Brit. Ent. pi. 432. 



This new and handsome species has been taken by Mr. Dale 

 at St. Leonard's, and in fir plantations at Barnfield near King- 

 wood ; end of July at Charmouth, by Mr. Morris ; and on 

 Parley Heath in August. 



10. E. similis Fall. — Meig. 392. 13. — July, near London. 



11. E. Fossarum Me";. — Meis.. 393. 15. — Near London. 



12. E. Pratorum Meg. — Meig. 393. 14. — Near London. 



13. E. Arbustorum Linn. — Panz. 14. 22. — July, near London. 



14. E. NemorumZ(zV/w. — "Lyra Harris's Exp. pi. 10. Order 111. 



f. 5. — June, m. July, and August, Dover. 



15. E. Rupium Fab. — cryptarum Pa7iz. 90. 18. — m. May, 



Dorset. 



16. E. Horticola DeGeer. — lineatus Harr. pi. 10. f. 4. — flavi- 



cinctus Fab. — June and July, on flowers of Ragwort. 



17. E. intricarius Linn. — bombyliformis Fab. — Panz. 59. 11. 



&12. — aureus Panz.90. 20. var.?—m. April, Mr.Dale; 

 June, on flowers, sides of banks, Carrington Moss ; 

 e. June, Coomb Wood, J. C. Clifton Hot-wells, 

 Captain Blomer. 

 IL Wings pubescent when highly magnified. 

 3. E. floreus Li7iTi. — Panz. 14. 21. — July, on flowers, com- 

 mon at Glanville's Wootton, Coomb Wood, &c. 

 The Plant is (Enatithe pimjJinelloidcs (Parsley Water Drop- 

 wort). 



