Manual for Diagnosis of Screw-worm Fly - xcs consulting

A Manual for the Diagnosis of Screw-Worm Fly
5. Lower (posterior) squamae covered with fine hairs above (H); no longitudinal stripes
on thorax (Chrysomya spp.) ………………................................................................….6
- Lower squamae without hairs except near base (I); thorax with three longitudinal
stripes ( =vittae) (Q,R) (Cochliomyia spp.)......................................................................9
6. Anterior spiracle (A) dark, blackish, blackish-brown or at least dark orange …....……..7
- Anterior spiracle pale yellow, creamy or white ……………....................................……10
7. Lower (posterior) squamae waxy white; frontal stripe of female parallel sided (J);
ovipositor relatively short (L); facets of male eye scarcely enlarged above and not
sharply demarcated from area of slightly smaller facets below (Fig. 10); moderate to
deep indentation in cheek of male and female (Fig. 10, J) ………Chrysomya bezziana
- Lower squamae blackish brown to dirty grey; frontal stripe of female broader in middle,
not parallel sided (K); ovipositor relatively long (M); no marked indentation in cheek (K)
.........................................................................................................................…………8
8. Setulae around vibrissae on face and parafacial with at least several, usually many,
black ones (N); facets of male eye much enlarged above and sharply demarcated
from area of smaller facets below (O) …….........................….Chrysomya megacephala
- Setulae around vibrissae not black or, rarely, two or three black ones present; facets
of eye of male larger above than below but without any distinct line of demarcation (P)
.................………............................................................................Chrysomya saffranea
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gena