436 Mr. Claude Morley on the 



P. albicoxa, Thoms.f (9.) Probably not uncommon, June 

 to August; Stafford., Herts., Norfolk, Surrey, Isle of 

 Wight. [ = ? sidcator, var. 5, Grav., g .] 

 P. cognatus, Holmgr. (20.) Common, May to September ; 

 Suffolk, Norfolk, Herts., Surrey, Sussex, Cornwall 

 (Botusrlcming, Marshall). 

 P. laticarpus, Thorns, f (5.) Rare, in boggy situations ; $ £ 

 swept in Henstead marsh (Suffolk), 12, vii, 1900, 

 and Rockland Broad (Norfolk), 10, vi, 1901 ; $ $ 

 at Metton (Norfolk), 30, viii, 1903 ; and Greenings 

 (Surrey) from W. Saunders' collection, viii, 1871. 

 Also from Nantes. [ = ? gracilentus, Holmgr. J 

 P. pulchellus, Holmgr. (54.) Very common May to Octo- 

 ber ; Suffolk, Norfolk, Northants., Herts., Wilts., Wales 

 (Trefriw, Newbery), Devon., Cornwall, Isle of Wight. 

 [ = sulcator, var. 1^,3 et 4, Grav. = festivus, var. 

 2 et 3, Grav. —frcdcrculns, Forst.] 

 P. festivus, Fab. (20.) Uncommon, July only; Suffolk, 

 Herts., Surrey, Kent. It has been bred from Syrph/us 

 sp., and Heliodincs roesella (rf. Isis, 1848, p. 986). 

 \_= festivus, Grav., $$, excl. var., 2 et 3 ; Grav. var. 

 1, facie totn nigra, £.] 

 /'. dorsalis, Holmgr. (9.) Not common, in marshy places, 

 June and July ; Suffolk, Surrey. [B. dorsalis, Holmgr. 

 £ = macukttus, Desv. £ £.] 

 P. compressus, Desv. (1.) Very rare ; I took a female at 

 Felden in Herts., while staying with Mr. A. Piffard, 

 flying on a chalky hillside, on August 9th, 1903 — 

 probably the only localized British specimen. I 

 noticed that in life the abdomen was no less 

 compressed. [ = Bassus ibalioides, Kriech.] 

 P. anomalus, Morl.f (1.) Longcross. 



I propose to conclude this paper with the description of 

 four little-known species of Bassus (sensu, Grav.), which 

 have been utterly ignored by all systematists : — 



Bassus hispanicus, Spinola, 



Ann. Soc. Fr., ser. ii, I (1843), p. 118. 



Dull and strongly punctate, black. Face deplanate, clypeus 

 apically truncate and not discreted. Antennae filiform, black, 32- 

 jointed, and as long as the body ; scape obconical and deeply 

 excised- flagellar joints cylindrical with the second and third ob- 

 conical, very short and the fourth elongate. Metathorax with a 



