Manual for Diagnosis of Screw-worm Fly - xcs consulting

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Agriculture, Fisheries and Forestry - Australia
9. Central stripe on thorax only just extending forward of mesonotal suture (Q);
fronto-orbital plates ( =parafacialia) of head with black setulae (S); fifth ( =fourth visible)
segment of abdominal tergite usually with only very slight dusting laterally; in females,
basicostal scale (T) dark brown to almost black.......................Cochliomyia hominivorax
- Central stripe on thorax extending well forward of mesonotal suture (R); fronto-orbital
plates with only yellow hairs (but their insertions appear as black dots); fifth (fourth
visible) abdominal tergite with dense white dusting laterally ( =white spots); in females,
basicostal scale is yellow………...........................................……Cochliomyia macellaria
10. Proepisternal seta (stigmatic bristle) present (U) ………..................................……….11
- Proepisternal seta absent (V) ……………........................................Chrysomya albiceps
11. Species large (7mm long); face and cheeks with dense silvery hairs on dark brown to
black surface....................................................................………….Chrysomya rufifacies
- Species small (5-6mm long); face and cheeks wholly yellow; male front femur with
prominent, long white hairs ………….................................................Chrysomya varipes
12. Body deep metallic blue to blue-black or yellow to brown; larger species (8-10mm
long)……………........................................................................................Calliphora spp.
- Body metallic green or coppery green; small to medium-size flies (