This paper describes a new species of the genus Lamproglena from Guizhou province. The type speciemens are deposited in the Laboratory of Fish Pathology, Institute of Hydrobiology, Academia Sinica, Wuhan. Lamproglena semilabecola sp. nov.(Figs. 1-13) Host: Semilabeo prochilus Distribution: Songtao and Yinjiang County, Guizhou Province Measurements(mm): total length, 1.46-1.65; head, 0.31-0.33, width 0.35-0.4;genital segment, 0.13-0.15, width 0.21-0.26; abdomen, 0.52-0.56. Diagnosis: this new parasite resembles L. brevis Kuang, 1977 in the number of coupling-bars and in the segmentation of legs, but differs from the latter in the following characters. (1) 5th pair of legs relatively small, while the latter large and long, producing on outer side of 5th thorax segment. (2) The abdomen occupies onethird of total length and not segmented, while in L. brevis it occupies only onefifth, with conspicuous segmentations. (3) The maxilla form is different.