1a |
a. Crossvein m-cu absent |
2 |
b. Cell dm present also: Antennal flagellum composed of six flagellomeres; branches of M often weakened; body variegated in background |
1b |
a. Crossvein m-cu present |
5 |
b. Cell d present |
|
2a(1a) |
a. Antenna short, with the last two flagellomeres forming a distinctly preapical arista |
Oxycera Meigen |
2b |
a. Antenna of ordinary length, much shorter than the three basal flagellomeres combined |
3 |
|
3a(2b) |
a. R4 fused with R3 |
Euparyphus (Aochletus) Osten Sacken |
b. Cell r3 fairly short and broad, with the membrane no more than 4-5x as long as its maximal width |
c. Aedeagus bifid |
also: Veins outlining cell dm apical to CuA2 and crossvein r-m feeble, concolorous with membrane |
3b |
a. R4 separate from, or fused with, R5 |
4 |
b. If R4 fused with R5, then the membrane of cell r3 at least 6x, but usually 8-10x, as long as its maximal width |
c. Aedeagus bifid or trifid |
|
4a(3b) |
a. Spines of scutellum usually separated at its base by a distance at least as great as the length of the spines |
Caloparyphus James |
b. If length of separation smaller, then the apical 1/4th of wing with only scattered microtrichia, and with extensive bare areas along the veins |
c. Aedeagus trifid |
d. Robust, with abdomen usually black, and either with median spots, or with transverse, usually interrupted, bands |
4b |
a. Spines of scutellum always closer together at its base than the length of the spines |
Euparyphus (Euparyphus) Gerstäcker |
b. Apical 1/4th of wing thickly and uniformly covered with microtrichia |
c. Aedeagus bifid |
d. Slenderer than above, and abdomen not mark as above |
also: Penultimate flagellomere of antenna subequal to the preceding one; facial pattern without a black or brown median area or vitta and yellow lateral margin |
|
5a(1b) |
a. A1 slightly though distinctly sinuous |
Myxosargus Brauer |
b. Face produced angularly downward at the lower margin |
c. Abdomen relatively slender, no more than 2/3 wide as long, and not patterned |
5b |
a. A1 not sinuous |
6 |
b. Face sometimes tuberculate or somewhat produced forward, but never downward |
c. Abdomen at least 3/4x wide as long, usually patterned |
|
6a(5b) |
a. Scutellum without spines |
Anoplodonta James (may not be valid record - check) |
b. Venation strong |
c. M1, M3, and crossvein r-m all present and distinct |
6b |
a. Scutellum with spines, in Labostigmina sometimes minute |
7 |
b. Venation variable |
|
7a(6b) |
a. Antenna with 5 flagellomeres, without a stylus |
Stratiomyini, 8 |
b. Ratio of scape to pedicel > 2:1 |
c. Venation variable |
7b |
a. Antenna with 6 flagellomeres, the last two flagellomeres forming a short but distinct stylus |
Odontomyiini, 9 |
b. Ratio of scape to pedicel not more than 1.5:1 |
c. Venation somewhat reduced, either crossvein r-m absent, or at least M3 reduced to a stump or weak fold, sometimes virtually absent |
|
8a(7a) |
a. Face receding |
Stratiomys Geoffroy |
b. Scetullar spines strong, located on the outer corners and outside the median third |
8b
|
a. Face produced or tuberculate, if tuberculate then the tubercle involves the area of antennal insertion |
Labostigmina Enderlein |
b. Scutellar spines weak or evanescent |
also: Flagellum cylindrical or almost so, scape 1.25-2.5x as long as pedicel; head not wider than thorax |
|
9a(7b) |
a. Wing with crossvein r-m absent, M1 and M3 strong and distinct nearly to wing margin |
Hedriodiscus Enderlein |
9b |
a. Wing with crossvein r-m present, M3 and sometimes M1 weak, reduced to a stump or fold, or virtually absent |
Odontomyia Meigen, 10 |
|
10a(9b) |
a. Pleural, postpronotal, and supra-alar regions in female, and usually in male, marked with distinct yellow areas |
Odontomyia (Odontomyia) Meigen |
10b |
a. Pleural, postpronotal, and supra-alar regions wholly black or without distinct yellow areas in both sexes |
11 |
|
11a(10b) |
a. Abdomen black in background, with transverse paired yellow or green linear or triangular markings at the tergal apices |
Odontomyia (Catatasina) Enderlein |
11b |
a. Abdomen yellow or green in background, usually with a median longitudinal black stripe dorsally, the stripe sometimes occupying most of the dorsum but leaving broad lateral margins pale |
Odontomyia (Odontomyiina) Enderlein |
|