1913] Melander — A Synopsis of the Sapromyzidae 61 



Angle of front and face obtuse, the front more inclined than the face, the mouth 

 opening therefore not retracted 9 



8. Posterior cross-vein in middle of wing; third vein sinuous. (Fig. 4.) 



Procrita Hendel. 



Posterior cross-vein beyond the middle of wing; third vein straight; eyes 

 horizontally oval. (Fig. 8.) .' Trigonometopus Macquart. 



9. Both fronto-orbital bristles reclinate 10 



Anterior pair of fronto-orbitals extending inwards and forwards; 1 sternopleural ; 



third joint of antennae elongate. (Fig. 9.) Camptoprosopella Hendel. 



10. Front forming no evident angle with the face; head higher than long; fourth 



vein bowed forward at tip of wing, narrowing the first posterior cell. (Fig. 5.) 



Griphoneura Schiner. 



Front and face forming an evident though rounded and obtuse angle; head as 

 long as high 11 



11. Orbital bristles arising from tubercles; wings rather slender basally. (Fig. 3.) 



Chaetoccelia Giglio-Tos. 



Orbits without tubercles; wings not narrowed on basal half 12 



12. Thorax opaque or sub-opaque, ground color usually dark, ocellar bristles 



usually large and spaced far apart near the front ocellus, behind the ocellars 

 typically one or two pairs of outwardly diverging small bristles; arista usually 

 plumose and at the same time the scutellar bristles usually cruciate; front 

 often relatively broad; wings rarely pictured; hind tibiae often marked with a 



basal ring. (Fig. 14.) Minettia Robineau-Desvoidy. 



Thorax shining or but slightly pollinose, its ground color usually yellow; ocellar 

 bristles usually small and placed close together behind the front ocellus, the 

 other bristles rarely present; arista often pubescent and scutellar bristles 

 generally parallel or diverging; convergent scutellar bristles typically not 

 occurring with a plumose arista; front usually narrower; wings often pictured; 

 hind tibiae rarely annulate. (Fig. 13.) Sapromyza Fallen 



13. Metallic black species; front rather narrow; two dorsocentral bristles. (Fig. 15.) 



Lonchaea Fallen. 



Yellow, largely yellowish, or cinereous species, not metallic: front broad; four 

 dorsocentral s. (Figs. 16-21.) Palloptera fallen. 



Lauxania Latreille, sensu Iato. 



Including Lauxania s. str., Caliope Haliday, Xangelina Walker, Minettia Robineau- 

 Desvoidy, and Sapromyza Fallen. 



1. Dorsum of thorax black or blackish in ground color, overlaid or not with polli- 



nose coating; wings never pictured (except sometimes extreme base of cross- 

 veins infuscated) 2 



Mesonotum yellow, testaceous, reddish, or brown, not black in ground color, 

 except rarely a median dark vitta; wings often pictured 45 



2. Third antennal joint linear, elongate, cylindrical, the first joint as long as or 



longer than the second; center of face -protuberant; facial orbits white prui- 

 nose (Lauxania sensu stricto) 3 



