Females, M. luteicornis vs M. occidentalis | Males, M. luteicornis vs M. occidentalis

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1. Females, M. luteicornis vs M. occidentalis

1M. luteicornis - Fore basitarsi with dark brownish to black hairs on the outer surface - T5 with only black hairs - Hind basitarsi with vibrant orangish hairs on the inner surface    1M. occidentalis - Fore basitarsi with yellow to orangish hairs on the outer surface - T5 with obvious patches of white hair present near the lateral edges - Hind basitarsi with dark brownish to black hairs on the inner surface   

2. Males, M. luteicornis vs M. occidentalis

1M. luteicornis - Scutum hair color generally more orangish, in direct comparison - S2 with a strong white band along the rim which is not weakened or interrupted medially - Basal hair band of T4 present, often taking up nearly half of the segment s length at the middle, not hidden beneath the rear edge of T3 - In direct comparison, larger    1M. occidentalis - Scutum hair color generally more beige or off-white, in direct comparison - S2 with a white band along the rim that is medially interrupted or weakened by darker hairs - Basal hair band of T4 weakened or absent, often hidden beneath T3 - In direct comparison, smaller