Extracted from: Snelling R.R., (1983). The North American Species of the Bee Genus Lithurge (Hymenoptera: Megachilidae). Contributioun in Science, number 343, pp. 1-11. The Natural History of Los Angeles County, 1983|
The type of L. littoralis, from Port Isabel, Texas, is in the British Museum (Natural History) and was made available by G. R. Else. This type has been compared with specimens of L. bruesi; there is no doubt that the two are conspecific. Mitchell (1938) first suggested that this might be the case but had not seen the type of L. littoralis.