166 



[July 



HYDROPHORUS Whlbg. pectinulatus Liv. 



bisetus Ltv. 

 balticus Melg. 

 prsecox Lelim. 

 litoreus Fall. 

 viridis Meig. 

 bipunctatus Lehm. 

 borealis Lw. 

 rufibarbis Gerst. 

 nebulosus Fall. 



LIANCALUS Lw. 

 virens Scop. 

 lacustris Scop. 



CAMPSICNEMUS JValk. 

 magius Lw. 

 pusillus Meig. 

 scambus Fall. 

 curvipes Fall. 

 loripes Sal. 

 armatiis Zett. 



picticoniis Zett. 



ECTOMUS Mik 

 alpiniis Hal. 



TEUCHOPHORUS Lw. 

 spinigerellus Zett. 

 monacanthus Lw. 

 pectinifer Kow. 

 simplex Mik 



SYMPYCNUS Lw. 



spiculatus Qerst. 

 cirripes Walk. 

 annulipes Meig. 

 aeneicoxa Meig. 



BATHYCRANIUM Strobl 

 bicolorelluni Zett. 



CHRYSOTIMUS Lw. 



molHculiis Fall. 

 coiicinntis Zett. 



XANTHOCHLORUS Lw. 

 ornatus Sal. 

 tenellus Wied. 



ANEPSIOMYIA Bezzi 



flavivenlris Meig. 

 MICROMORPHUS Mik 



albipea Zett. 

 THINOPHILUS Whlbg. 



flavipalpis Zett. 



I'uficornis Hal. 



SCHCENOPHILUS Mik 

 versutus Walk. 

 APHROSYLUS Walk. 

 celtiber Sal. 

 raptor Walk. 

 ferox Walk. 



Species described from British specimens, but never recognised 

 since, and now omitted : — 



Psilopiis obscurus Meig. ; now considprecl a synonym of P. longiilus Fall. 

 Dolichopus prsetextatus Hal. ; possibly a Paecilobothru-f. 

 Porphyrops gravipes Walk. ; probably P. patula Radd. 



Species described in Walker's Ins. Brit. Dipt., but now omitted : — 

 Psilopus lugens Meig. ; now considered a synonym of P. longulus Fall. 

 Neurigona Erichsonii Zett. ; never absolutely recorded as British yet. 

 Tachytrechus ammobates Stann. ; never absolutely recorded as British yet. 



TABLE OF GENERA. 



1 (68) Thorax with acrostichal bristles.* 



2 (53) Acrostichal bristles in pairs (i. e., two rows). 



3 (36) Arista dorsal (subapical in 13 Chry solus, and 25 Achalcus). 



4 (5) Discal vein forked 1- Psilopus Meig. 



5 (4) Discal vein not forked. 



6 (9) Colour not metallic. 



7 (8) Hypopygium free, plump, and turned downwards ...2. Neurigona Rnd. 



8 (7) Hypopygium small, and concealed 3. Eutarsus Tiw. 



9 (6) Colour metallic. 



10 (13) Basal joint of hind tarsi bearing one or more bristles above. 



11 (12) Face extending as low down as the bottom of the eyes (conf. Dol. laticola) 



4. Sygroceleuthus Lw. 



* The acrostichal bristles are the tiny bristles which run down the actual middle of the 

 thorax between the two rows of the large dorso-central bristles. 



