| Type | Article |
| Authors(s) | Walton, G.A. |
| Year | 1939 |
| Title | Two water bugs new to Great Britain: Microvelia pygmaea Duf. & Microvelia umbricola Wrob. (Hemipt.) |
| Volume | 2 |
| Page(s) | 26-33 |
| Published in/Publisher | Journal of the Society for British Entomology |
| Type | Article |
| Authors(s) | Walton, G.A. |
| Year | 1939 |
| Title | Two water bugs new to Great Britain: Microvelia pygmaea Duf. & Microvelia umbricola Wrob. (Hemipt.) |
| Volume | 2 |
| Page(s) | 26-33 |
| Published in/Publisher | Journal of the Society for British Entomology |