FAMILY 0TITID.1-: THE PICTURED-WING FLIES 281 



57. Discal cell conspicuously widened before the anterior crossvein (5, 26). 



Rivellia Desvoidy 

 Discal cell not conspicuously widened, rarely widest at the middle 58 



58. Anterior crossvein obli(iue, at the middle of the discal cell (48, 86). 



Himeroessa Lcew 

 Anterior crossvein transverse, well beyond the middle of the discal 

 cell Acrostictella Hendel 



59. Face sharply carinate 60 



Face not sharply carinate 62 



GO. Third antennal segment angulate above or elongate 6] 



Third antennal segment orbicular Tetropismenus Loew 



Gl. Third antennal segment angulate at upper apex Tephronota Loew 



Third segment elongate Hiatus Cresson 



62. Mesonotum with presutural bristles (12, 59) Melieria Desvoidy 



Mesonotum without presutural bristles 63 



63. Front widening anteriorly 64 



Front narrowed anteriorly (34 ) Automola Lcew 



G4. Three or four pairs of scutellar bristles; postocellars long and fine; 



hair of front long and rather abundant (53, 60) Calif ortalis, n. g. 



Two pairs of scutellars; postocellars short; hair of front short, sparse 

 and rather coarse 65 



65. Verticals long and strong; cheeks much narrower than the eye-height 



( Ortalis auct ) 66 



Verticals short; cheeks almost or quite as wide as the eye-height 

 (6, 61) Tetanops Fallen 



66. Two pairs of well developed frontals; lunule haired (77, 95). 



Ceratoxys Rondani 

 Only one pair of well developed frontals; lunule bare (54, 94). 



Ortalimyia, n. g. 



Melanolomina, new g-enus 



Differs from Melanoloma Loew in possessing two pairs of scutellar 

 bristles. In the two species before me the mesonotum is more or less 

 reddish and not metallic. Genotype: — Odontomera varians Schiner. 



Zetekomyia, new genus 



Differs from Melanolomina in having the front more than twice as 

 wide as the eyes (from dorsal view) and a somewhat more elongate and 

 more distinctly clavate abdomen. The head bears only four pairs of 

 bristles : a pair of frontals, pair of ocellars, situated behind the anterior 

 ocellus, and inner and outer verticals; hair very short; antennae sepa- 



