Citations: Anonym 1931: [Howard, C. W.] Lingnan Science Journal, Canton 10, S. 335-337
Hoffmann, W. E. 1927: [Howard, C. W.] Lingnan Science Journal, Canton 5, S. 293-299
Riley, W. A. 1928: [Howard, C. W.] Entomological News , Philadelphia 39, S. 167-168, B15 10004
Riley, W. A. 1928: [Howard, C. W.] Journal of Economic Entomology ISSN: 0022-0493, Geneva/N.Y 21, S. 440-441, B15 10592
Riley, W. A. 1928: [Howard, C. W.] The Canadian Entomologist, Orillia 60, S. 101-102, B15 10219