Bombus improbus
| Type Number: | 2633 |
| Genus: | Bombus |
| Species: | improbus |
| Subspecies: | |
| Author: | Cresson, 1878 |
| Sex: | male |
| Country: | United States |
| State / Province: | Colorado |
| County: | |
| Collector: | Morrison, H.K. |
| Date Collected: | |
| Family: | Apidae |
| Order: | Hymenoptera |
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| Type Number: | 2633 |
| Genus: | Bombus |
| Species: | improbus |
| Subspecies: | |
| Author: | Cresson, 1878 |
| Sex: | male |
| Country: | United States |
| State / Province: | Colorado |
| County: | |
| Collector: | Morrison, H.K. |
| Date Collected: | |
| Family: | Apidae |
| Order: | Hymenoptera |
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