9 8 R. W. CROSSKEY 



3 Mesonotum and abdomen with a bold pattern of small black spots against a very 



pale greyish yellow pollinose background, pattern comprised as follows : prescutum 

 with pair of rounded sublateral spots and anteromedian black mark, scutum 

 with prescutellar black spot; abdomen with Ti + 2 black and a median and a 

 pair of sublateral black spots on T3 and T4. Legs uniformly reddish yellow. 

 Presutural intra-alar seta absent, two or three postsutural intra-alar setae, ia 

 setae therefore o + 2-3. Head profile as Text-fig. 50 . METAPHRYNO Crosskey 



- Nondescript forms without such pattern. Legs black or partly so, if mainly 



reddish yellow then at least the tarsi black-brown. Intra-alar setae always 



1 + 3. Head profile different ......... 4 



4 Wings distinctly bicolorous, creamy yellowish near base and suffused with brown 



anteromedially. Interfrontal area very reduced, not more than half as wide as 

 a parafrontal. Apical scutellar setae exceptionally strong, as large as or larger 

 than the subapicals; subapical scutellar setae widely separated, bases much 

 wider apart than distance from insertion of a subapical seta to its corresponding 

 basal seta ...... [PALIANA Curran, tribe Sturmiini] 



- Wings more or less completely hyaline, at most slightly brownish anterobasally. 



Interfrontal area not conspicuously narrow, as wide as or only slightly narrower 

 than a parafrontal. Apical scutellar setae (when present) much weaker than 

 subapicals; subapical scutellar setae not unusually widely separated, distance 

 between bases at most only a little greater than distance from base of one subapical 

 to its corresponding basal seta ......... 5 



5 Three post dc setae. Basal node of i? 4+5 with a row of 5-7 setulae that extends 



nearly half way to cross-vein r-ra. All frontal setae of <§ very strongly reclinate. 

 Rather elongate black and silvery forms (with characteristic appearance of 

 scutellum which is sharply divided into silver-and-black halves which reverse 

 in appearance with direction of light) . A NEOGMENA Brauer & Bergenstamm 



- Four post dc setae. Basal node of R i+i with only 1-3 setulae. Frontal setae all 



or mainly inclinate. Not such forms ........ 6 



6 Four sternopleural setae ........... 7 



- Two or three sternopleural setae ......... 8 



7 Mid tibia with one strong isolated ad seta. Eyes densely haired. Abdominal T5 



unusually small, less than half as long as T4. Scutellum with apical setae 

 stronger than laterals, crossed and horizontal . APLOMYA Robineau-Desvoidy 



- Mid tibia with two strong ad setae. Eyes virtually bare. Abdominal T5 normal, 



nearly as long as T4. Scutellum with apical setae weaker than laterals and 

 directed obliquely upwards . . 'Bactromyia' crassiseta Baranov ( ? genus) 



8 Parafacials covered with very long conspicuous hair: haired area extending to 



ventral ends of parafacials and more or less continuous with hairing of the genae. 

 Two sternopleural setae. § with only one pair of proclinate orbital setae 



PSEUDALSOMYIA Mesnil 



- Parafacials usually bare, if some hairing present then either confined to upper 



halves of parafacials or very short and inconspicuous. Three sternopleural 

 setae (except in Palia and some specimens of Teretrophora). 9 with two pairs 

 of proclinate orbital setae .......... 9 



9 Mid tibia with one ad seta (very strong and in submedian position) . . . 10 



- Mid tibia with two or more ad setae (setae additional to main one sometimes very 



small in g of Teretrophora) .......... 11 



10 Intermediate abdominal tergites with discal setae. Ocellar setae present. Upper 

 occiput with black setulae behind the postocular row. Hind tibia with a pd 

 preapical seta in addition to the normal d and ad preapicals. Eyes sparsely 

 short-haired. Femora reddish yellow (at most only slightly blackish near the 

 apices) ERYTHROCERA Robineau-Desvoidy 



- Intermediate abdominal tergites without discal setae. Ocellar setae absent. 



