Abstract
Seventeen species of the cockroaches were recorded from three islands of the Ryukyus, namely, Okinawa, Ishigaki and Iriomote. These were all taken during my survey in May 1983. The female of Symploce yayeyamana Asahina (1979) was first described herein as taken from Iriomote Island. A brief description of the Allotype female is as follows; Body ca. 17mm, hindwing length 15mm. Body shining chestnut brown; the large prothoracic marking is deep brown, narrowly striped in the center as is the case in the male insect. Abdomen broad, supraanal plate broadly triangular, the apex rounded (Fig. 1). Subanal plate very broad covering whole abdominal end beyond the supraanal plate. A female and a larval specimens of Trichoblatta nigra (Shiraki) were recorded for the first time from Japanese faunal limits. Those were taken by Mr. S. Hori on Mt. Omoto, Ishigaki Island, and preserved in the collection of Mr. F. Kawamura, Ryukyu University.
