FAM. EMPIDID/E 241 
The following subgenera are closely related and are not sharply differentiated. — W iedemannia of 
Zetterstedt is not the same genus as W iedemannia of Meigen, 1838 : the latter is Mint4o Desvoidy. 
Subgenus Wiedemannia in the strict sense. Stigma large and circular, commencing much beyond 
the end of the first vein and. projecting into the wing so that it touches or passes the second vein, this 
vein being bent down around the stigma, five or six dorsocentrals alternating with rather long bristles, 
the anterior acrostichals reclinate unlike those of the prescutellar area, which are proclinate, scutellum 
with discal setulz; head prolonged below eyes about the eye-height; terminal lamellz of epipygium 
usually tipped with tuft of hairs. 
Type species : W. bistigma, Curtis.  Zetterstedt described two species, borealis and appendiculata. 
The former is synonymous with 5is/igma and becomes the type since the latter belongs to the earlier 
genus Clinocera. 
SuBGENUS PSEUDOWIEDEMANNIA, ENGEL 
Stigma more or less rounded, located much beyond end of first vein, smaller than in W'ede- 
mannia and not passing below second vein; at most five dorsocentrals with very weak alternating setula ; 
acrostichals biseriate onto the scutellum but either weak or strong ; cheeks about half the eye-height. 
Tyne species : P. lamellata, Loew, by Engel's designation. 
SuBGENUS EUCELIDIA, Mik 
Stigma elongate, beginning at the tip of the first vein and not touching the straightened second 
vein, costal spines strongly projecting; all the femora bearing preapical bristles on the front and hind 
sides; acrostichals if present all proclinate; scutellum with setule in addition to the apical pair of 
bristles ; alternate dorsocentrals small. 
Tyne species : E. Zetlerstedti, Fallen, by Coquillett's designation, 1903.  Mik founded his genus 
Roederia upon C. longipenuis, Mik. Engel finds that this species in the same as Eucelidia Escheri, Zetter- 
stedt. "Therefore Roederia falls a synonym of Eucelidia. 
SuBGENUS CLINOCERELLA, ENGEL 
Stigma elongate as in Eucelidia; legs without distinctive bristles; five or six dorsocentrals with or 
without alternating sete; acrostichals more or less developed, scutellum with or without setulze; head 
projecting downward half the eye-height and tapering to the proboscis. 
Type species : C. sorex, Engel, by Engel's designation. Mik used an unpublished name, 
Orthorhynchium, for this group. 
SuBGENUS CAMELOPIS, ENGEL 
Stigma elongate as in Eucelidia; five dorsocentrals with intermediate setze, acrostichals reaching 
over scutellum, the anterior ones reclinate, the posterior ones proclinate, rarely the intermediate dorso- 
centrals weak or wanting; scutellum setulose; humeral bristle long and weak; head strongly projecting 
downward below the eys nearly or quite the eye height, in profile rectangular. 
Type species : C. ?Aantasma, Mik, by Engel's designation. 
SuBGENUS PHILOLUTRA, Mik 
Stigma elongate, as in the preceding, costal spines smaller; preapical femoral bristles not strong; 
anterior acrostichals reclinate, the posterior ones proclinate, scutellum with setule, five dorsocentrals 
often with intermixed setulaze, head sometimes greatly drawn out beneath the eyes. 
