Pachycerina, : Macquart, 1835

Davies, Gregory B. P. & Miller, Raymond M., 2009, Revision of Afrotropical Pachycerina Macquart (Diptera: Lauxaniidae), African Invertebrates 50 (2), pp. 295-295 : 307

Key to Afrotropical species of male Pachycerina

1 Prefrons (face) lateral spots large, black; wing hyaline or infuscated anteriorly .... 2

– Prefrons (face) lateral spots small, brown; wing hyaline ....................................... .................................................................. P. micropunctata sp. n. ( Madagascar)

2 Abdomen yellow or orange-brown, with paired T6 spots .................................... 3

– Abdomen black, without paired T6 spots ............................................................. 8

3 Ventral margins of abdominal tergites with clear black edging............................ 4

– Ventral margins of abdominal tergites orange-brown, without any black edging ...... 5

4 Wing strongly fumose, male gonopods about equal in length ................................ .................................................................. P. nigrivittata sp. n. (southern Africa)

– Wing weakly fumose, male gonopods unequal in length ....................................... ..................................................................... P. stuckenbergi sp. n. ( Madagascar)

5 Antenna dark brown, distinct infuscation of scape, pedicel and/or postpedicel... 6

– Antenna yellow (no infuscation of scape, pedicel, postpedicel) .......................... 7

6 Thoracic vittae orange to dark brown (markings often diffuse); pedicel dark brown, postpedicel blackish brown; artistal plumosity rather sparse ................................. ............................................................................ P. pellocera sp. n. ( Madagascar)

– Thoracic vittae black (instensely marked); postpedicel yellow, outer half of pedicel and scape brown; aristal plumosity dense ............ P. potentilla sp. n. ( São Tomé)

7 Profemur posteriorly yellow with brown area apically; lower lateral corners of prefrons (face) with brown smudge ............... P. seychellensis Lamb ( Seychelles)

– Profemur posteriorly all yellow-orange; lower lateral corners of prefrons (face) not infuscated ........................................ P. vaga Adams (southern and eastern Africa)

8 Lower lateral thoracic vitta restricted to upper margin of sternopleuron, mid- and hind-legs yellow-orange ....................................................................................... 9

– Lower lateral thoracic vitta expanding to cover entire sternopleuron, mid- and hind-legs mainly blackish ........................................... P. atrimela sp. n. ( Madagascar)

9 Wing fumose ...................................................................................................... 10

– Wing hyaline .............................................. P. crinicornis (Thomson) ( Mauritius)

10 Profemur all yellow-orange, haltere orange .................. P. gabela sp. n. ( Angola)

– Profemur yellow with black tip, haltere black ........................................................ ..................................................................... P. obscuripennis Lamb ( Seychelles)