Delia coarctata

Michelsen, Verner, 2007, A new European species of Delia Robineau­Desvoidy (Diptera: Anthomyiidae) near the wheat bulb fly, D. coarctata (Fallén), Zootaxa 1412, pp. 61-67 : 62

Key to the males and females of the Delia coarctata species group

1 Males (abdomen narrow, parallel­sided) .................................................................................................. 2

– Females (abdomen long­ovoid)................................................................................................................ 5

2(1) Sternite V with simple setae and setulae only ( Fig. 8 ) ............................................................................ 3

– Sternite V at apex of lobes with 3–5 close­set, blunt spinules ................................................ D. montana

3(2) Head with eyes narrowly separated by frons............................................................................................ 4

– Head feminized, eyes widely separated by frons .................................................................... D. latissima

4(3) Apical pv seta of fore tibia coarse, apically truncated; fore tarsomere 1 longer than fore tarsomeres 2–4 ( Fig. 2 ) ................................................................................................................................... D. coarctata

– Apical pv seta of fore tibia simple; fore tarsomere 1 shorter than fore tarsomeres 2–4 ( Fig. 1 )................ ............................................................................................................................................. D. coarctoides

5(1) Cerci with straight spinules ( Fig.10 ) ........................................................................................................ 6

– Cerci with apically recurved spines ......................................................................................... D. montana

6(5) Prealar seta setulose or absent. Vein C without v setulae on basal section between humeral and subcostal breaks ...................................................................................................... D. coarctata (and D. latissima ?)

– Prealar seta present. Vein C with some v setulae on basal section .................................... D. coarctoides

Figures

FIGURES 7 – 11. Delia coarctoides sp. nov. 7. Male hypopygial parts in left lateral view. 8. Male sternite V. 9. Female spermathecae and ducts. 10. Female cerci, epiproct and tergite VIII. 11. Female hypoproct and sternite VIII. Same scale for 7 – 8 and 10 – 11 respectively.

FIGURES 1 – 2. Male right distal fore tibia and tarsus. 1. Delia coarctoides sp. nov. with numbered tarsomeres. 2. D. coarctata (Fallén). Arrows point at apical pv seta. Same scale.