August, 1904.] 169 



68 (67) Frous iiol metallic; ccislii willmul a tiliick swcUiii!,' ; lii ml tarsi (in British 

 S|)ccie8) with a hnisli oC liiiirs on tlu' Ihinl joint ( J )■.. 



33. iSympycnus Lw. 



61) (66) Anteiiiiaj and abcloition maiulv orange 31. Bathyc ranium %iroh\ 



7U (1) Acrosticlial bristles entirely absent. 



71 (74) Bristles on thorax and seutelluni yellow. 



72 (73) Hypopvgiuni small ; arista nearly apical 35. Chrysotimux Ijvi. 



73 (72) Ilypopygium a large swollen knob ; arista obviously dorsal... 



36. Xanthuchlorus Lw. 



74 (71) Bristles on tliorax and scutellum black. 



75 (78) Palpi not large ; arista near base of third autennal joint, 



76 (77) Thorax metallic, brilliant brownish-black; third joint of antennee ((J) 



elongate oblong ; genital lamella; obvious (conf. Chrysolus Itr.sus, green, 

 with antennae short and blunt) 37. Anepsiomyia Bezzi 



77 (76) Thorax not metallic, dull grey; third joint of antennae short; genital 



lamellae concealed ; face broad (conf. 31 Eciomus, face narrowed 

 below antennae) 38. 3Iicro7norj)hus Mik 



78 (75) Palpi very large ; arista not near base of thii'd antennal joint. 



79 (82) Third joint of anteiuiae short and rounded at tip. 



80 (81) Arista dorsal ; species rather large 3!). Thiuopfiilus Whlhg. 



81 (80) Arista subapical ; species small 40. Schoenophilus Mik 



82 (79) Third joint of antennae elongate, attenuated, pointed, and with an apical 



arista 41. Aphrosylus Walk. 



1. P!SILOPUS Meig. 



1 (2) Basal joint of hind tarsi much longer than the second; middle tarsi ( <? ) 



with the third and fourth joints white 1. platypterus Fabr. 



2 (1) Basal joint of hind tarsi barely longer than the second; middle tarsi 



normal. 



3 (4) Front tarsi with the fourth joint lobed ( <? ) 2. Wiedemanni Fall. 



4 (3) Front tarsi with the fourth joint normal. 



5 (8) Abdomen with inconspicuous bands. 



6 (7) Dusty green ; antennae pale at the base ^. longulux Va.\\. 



7 (6) Brilliant green ; antennae wholly black 'i. Isetus Meig. 



8 (5) Abdomen with broad dark bands 5. contristans Yfiedi. 



1. P. platypterus i''abr. : (.•oiiiiiKiii on tree trunks, palings, &c., from 



Penzance to Inverness. 



2. P. Wiedemanni Fall. : not uncoumion near the coast from Bourne- 



mouth to Aberlady, but also occurring as uuuh inland as 

 Newmarket or Woking. 



3. P. loiu/ulus Fall. : occurring locally in abundance in the southern 



half of England. 

 ■1, P. IcBtus >reig. : a little known and very rare species, of which I 

 have seen one male from Fawley, and one female from 



Bournemouth. 



p 



