Rediscovery of the eucerine bee Xenoglossa cressoniana in Texas

Xenoglossa cressoniana, also known as Tetraloniella cressoniana or Xenoglossodes cressoniana, is a eucerine bee known mainly from the US Great Plains. The species was described from a female collected somewhere in Texas in the early 1900s. Here, we report rediscovery of this species in Texas after over a century with no intervening observations. While surveying north Texas ranches, we collected six specimens, including both males and females, at four sites northwest of the Dallas-Fort Worth Metroplex. Xenoglossa cressoniana's range, the Great Plains and parts of the deep South, covers a large proportion of the United States. The southern and northern Great Plains, and deep South, have been historically overlooked by most bee researchers. Our results show the urgent need to increase data from under-sampled regions, even within a heavily sampled country such as the US.