280 Mr. F. Walker on some undescribed Ceylon Insects. by turns touching it, and as it were testing it. In the course of a few minutes the lips had closed upon the atom, and it was seen dilating the stomach as it slowly made its way downwards. Sarcodictyon appears to me to approach very closely to the Helianthoid type. This genus on the one hand, and Zoanthus on the other, are probably the links by which the two suborders Alcyoniaria and Actiniaria are united. I have never had an opportunity of examining Zoanthus, but think it probable that isolated calcareous spicula will be found scattered in its tissues. EXPLANATION OF PLATE IX. Fig. a. Sarcodictyon catenata : a single polype expanded. Magnified 12 diameters. Fig. b. The same, of the natural size. Fig. c. A tentacular pinna. Magnified 85 diameters. Fig. d. A pinna contracted and crushed flat between the plates of the compressorium. Magnified 250 diameters. Sandhurst, Torquay, Sept. 27th, 1858. XXX. — Characters of some apparently undescribed Ceylon In-sects. By F. Walker. [Continued from p. 209.] Fam. Buprestidae. Chrysobothrys suturalis. Cupreo-purpurascens, subtus cyaneo-viridis aureo nitens, frontis lateribus thoracisque margine antico auratis, elytris basi auratis, sutura cyaneo-viridi. Long. 4 lin. Agrilus sulcicollis. Nigro-seneus, thorace transverse sulcato, elytris punctatis foveolatis, lateribus antice emarginatis. Long. l£lin. Fam. Elateridae. Cardiophorus humerifer. Niger, capite, thorace et elytris basi runs, elytris punctato-lineatis, luteo bifasciatis. Long. 3 lin. Corymbites dividens. Rufa, capite, antennis, thoracis vitta pos-tice abbreviata, elytrorum triente apicali abdominisque apice nigris. Long. 3^ lin. Corymbites divisa. Rufa, pubescens, capite, antennis, elytrorum dimidio fere apicali abdomineque nigris. Long. A\ lin. Athous punctosus. Niger, dense pubescens, capite thoraceque confertissime punctatis, antennis pedibusque piceis, elytris punctato-lineatis, Long. 6 lin. Athous inapertus. Niger, ferrugineo sordido dense tomentosus, capite thoraceque subtilissime punctatis, elytris punctato-lineatis, pedibus rufescentibus. Long. 4 lin.
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