HOME --- Introduction
---Traps ---
Identification ---
References
HOME --- Introduction
---Traps ---
Identification ---
References
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A key was constructed for the species found in this study. The key only works for these species, and species not found in this study will not be included in this key. Click on the name of the species for more details and pictures.
| 1. | Wings pale with dark markings | 2 |
| --- | Wings dark with pale markings; second radial cell completely dark | 11 |
| 2. | Wings with clear and numerous dark markings, spread over the wing | 3 |
| --- | Wings with few, or vague, pale markings | 5 |
| 3. | Wings with a dark spot in cell cu | 4 |
| --- | No dark spot in cell cu | C. impunctatus |
| 4. | Wing veins M1, M2 and CU1 dark right up to the edge of the wing (M1 may not be dark right up to the edge) | C. pulicaris |
| --- | Wings veins M1, M2 and CU1 with a clear pale spot at the edge of the wing | C. punctatus |
| 5. | Wings with several faded markings and the third segment of the palp with a sensory pit | 7 |
| --- | Wings with only one marking or no clear markings at all; no sensory pit on the palp | 6 |
| 6. | Wing with very clear, dark spot over the second radial cell and no other markings. Pale tips to the halteres | C. stigma |
| --- | No clear markings on the wings at all, just a little colouration near the radial cells. Male genitalia with long spines on the end of the 9th tergite and the posterior margin is completely convex with no central notch | C. grisescens |
| 7. | Female | C. obsoletus group; no further identification possible |
| --- | Male | 8 |
| 8. | 9th sternite joined | 9 |
| --- | 9th sternite completely divided | C. scoticus |
| 9. | 9th sternite with wide, arched indentation | 10 |
| --- | 9th sternite with deep, narrow notch | C. obsoletus |
| 10. | 9th sternite membrane with spicules. 9th tergite posteriorly flat | C. dewulfi |
| --- | Sternite membrane with no spicules and tergite with a slight concavity | C. chiopterus |
| 11. | Wing mostly dark with only a few pale markings, including a pale spot just behind the radial cells | 12 |
| --- | Wings without a pale spot behind the radial cells or with many pale markings | 13 |
| 12. | Females: the sensilla coeloconica occur on antennal segments 3-15. 3rd segment of the palp quite swollen | C. kibunensis |
| --- | Females: antennal segments 3 and 11-15 only have sensilla coeloconica. 3rd segment of the palp is only slightly swollen | C. pallidicornis or C. achrayi (not possible to separate the females) |
| 13. | Wing with no clear markings, except for the dark 2nd radial cell. Sensilla coeloconica on female antennal segments 3-14 | C. segnis |
| --- | Wing with many pale markings. Pale spots in cells r5, m1, m2 and cu all touch the edge of the wing. Pale spot over the veins R-M and M1, which reaches the costa. Male genitalia with a very rounded tergite | C. festivipennis |