E. dilaticornis is dark metallic blue underneath, on the abdomen. Females of E. nagaii and E. gressitti look similar from above, but are not dark metallic blue underneath.
I don't have a female E. gressitti to compare with. A female E. nagaii that I have is slightly wider.
This female has more orange pubescence on the pronotum than is normal for E. dilaticornis, but it is most likely dilaticornis based on what there is to see.
E. abangae is another species from Sabah which has at least 6 forms: almost totally black elytra to almost totally orangish-red.