Sept., 1913.] Melander: Synopsis of Diptera. 247 



Ocelli placed on the vertex, the front not produced ; arista short-pubescent 

 or bare ; wings at most with small dark spots 3. 



3. Third antennal joint ovate but with a sharpened end, the arista somewhat 



thickened; two scutellar bristles. (Europe, Asia, North America.) 



Cerodonta Rondani. 



Third antennal joint not ending in a blunt point; four scutellar bristles 



present 4. 



4. Cheeks but one sixth the eye-height ; two fronto-orbitals ; face strongly 



convex ; antennas scarcely one sixth as long as the head ; vibrissae 

 inserted distinctly above the front border of the oral margin. (North 



America.) Hemeromyia Coquillett. 



Cheeks broader; three or more fronto-orbitals; face not convex 5. 



5. Costa extending to the fourth vein, which is as strong as the third ; cheeks 



receding; wings unspotted; femora not thickened; chsetotaxy vari- 

 able 6. 



Costa extending to third vein only 8. 



6. Posterior crossvein wanting; second, third and fourth veins close together, 



ending before the tip of the wing, the fifth vein greatly diverging 



from the fourth. (North America.) Antineura n. g. 



Posterior crossvein present ; the fourth vein ending beyond the tip of the 

 wing, the fifth vein not greatly diverging 7. 



7. Ovipositor wedge-shaped, short. (Europe, Asia, Australia, Africa, North 



America.) Agromyza Fallen. 



Ovipositor tube-like, elongate. (Europe, North America.) .Liriomyza Mik. 



8. Anterior crossvein situated near the base of the wing, the posterior cross- 



vein wanting, or else very close to the anterior; fourth and fifth 

 veins weak, the third vein ending far before the wing-tip ; auxiliary 



vein usually parallel with the first vein 9. 



Anterior crossvein situated nearly opposite the end of the first vein ; pos- 

 terior crossvein present, and always some distance from the anterior ; 

 third vein ending near the wing-tip, the fourth and fifth veins not 

 weaker than the second and third 10. 



9. Posterior crossvein entirely wanting. ( Europe, Asia, Africa, North America.) 



Phytomyaa Fallen. 

 Posterior crossvein present, the discal cell minute. (Europe, North America.) 



Napomysa Haliday. 



10. Hind femora more or less incrassate ; vibrissal angle of cheeks prominent; 



lower occiput reaching forward and bristly ; wings usually spotted, at 



least at the end of the first vein 11. 



Hind femora not thickened ; cheeks receding, the occiput descending 

 straight down; wings not spotted. (Europe, Africa, North America.) 



Doiiiomyza Rondani. 



11. Mesopleurffi not hairy; postverticals strong; four or five dorsocentrals ; 



two intra-alars ; no preapical tibial spurs ; femora yellow with pre- 

 apical spot. (Europe, North America.) Odinia Desvoidy. 



