Metelasmus Coquillett

Graciolli, Gustavo & Dick, Carl W., 2004, A new species of Metelasmus (Diptera: Streblidae: Streblinae) from southern South America, Zootaxa 509, pp. 1-8 : 4

Key to the species of Metelasmus Coquillett

1. Postgena with posterolateral margin sinuous, convex laterally at level of remiform scale; postgena terminating posteromedially in a process ( Fig. 2 ). Frontoclypeal detached plates about as long as broad ( Fig. 1 ). Occiput shorter, without an anterolateral triangular process ( Fig. 3 ). Female: tergite VII with two pairs of setae ( Fig. 5 ). Epiproct with 4 setae ( Fig. 6 ). Male: gonopod longer; gradually narrowing toward the hooked apex ( Figs. 7, 8 ) ............................................. Metelasmus wenzeli new species

­ Postgena with posterolateral margin concave, with a narrow process posterolaterally, directly posterior to remiform scale ( Fig. 10 ). Frontoclypeal detached plates about twice as long as broad ( Fig. 9 ). Occiput longer, with an anterolateral triangular process ( Fig. 11 ). Female: tergite VII with one pair of setae ( Fig. 12 ). Epiproct with 4 apical setae and 2 much shorter pairs anteriorly ( Fig. 13 ). Male: gonopod shorter; rapidly narrowing toward the hooked apex ( Fig. 14 ) ................................................................. ............................................................................... Metelasmus pseudopterus Coquillett

Figures

FIGURES 1 – 8. Metelasmus wenzeli new species. 1. Frontoclypeus, holotype; 2. Postgena, male paratype from Paraná, Brazil; 3. Postvertex and occiputs, male paratype from Paraná; 4. Right wing, male paratype from Paraná; 5. Tergite VII and 6. Epiproct, female paratype from Paraguay; 7. Right gonopod, male paratype from Paraná; 8. Left gonopod, holotype.

FIGURES 9 – 14. Metelasmus pseudopterus Coquillett. 9. Frontoclypeus, female from Paraná, Brazil; 10. Postgena, female from Paraná; 11. Postvertex and occiputs, female from Paraná; 12. Tergite VII and 13. Epiproct, female from Paraná; 14. Right gonopod, from Rio Grande do Sul, Brazil (from Graciolli & Carvalho, 2001).