''Sphecodes crassus'', common name swollen-thighed blood bee, is a species of bee. It was described by
Carl Gustaf Thomson
Carl Gustaf Thomson (13 October 1824, in Malmöhus – 20 September 1899, in Lund) was a Swedish entomologist.
Thomson became a student in the University of Lund in 1843, graduated in 1850 and became associate professor of zoology there in 1857. ...
in 1870.
References
Halictidae
Insects described in 1870
{{sweat-bee-stub