Mr. J. Nietner on new Ceylon Coleoptera. 179 



latter part; in the 3rd and 5th interstices three setigerous 

 punctures, in the 3rd and 4th interstices a longitudinal apical 

 macula, of yellowish colour, coalescent with the margin, which 

 is of the same colour; two shallow impressions on either 

 side, one below the shoulders, the other near the apex. Legs 

 shorter than in O. cyanocephala. 



65. Casnonia pilifera, N. 



C. glaberrima, nitidissima (quasi lacca obducta), pilis longis sparsis 

 vestita, nigra, ore (labro excepto) antennisque brunneis, his apicem 

 versus dilutioribus, elytris niaculis 2 subapicalibus argenteis, pedi- 

 bus piceis, femoribus basi albis, trochanteribus obscurioribus, tibiis 

 tarsisque brunnescentibus. Long. corp. 3f lin. 



Specimina nonnulla cum prsecedente cepi. 



This elegant species is of the same size as the O. cyanocephala, 

 but, with the exception of the elytra and abdomen, which are 

 shorter and plumper, still more slender and graceful. Head 

 large, very narrow and prolonged behind, much more so than in 

 O. cyanocephala, with two large shallow impressions between the 

 antennse, and another small one just above them. Occiput 

 slightly transversely rugose. Thorax very slender, half as broad 

 as the head, of hardly the same length, obconic, constricted 

 below the apex, then gradually increasing in size to below the 

 middle; the base abruptly narrowed, cylindric, and impressed 

 with three deep annuliform wrinkles. Elytra about as long as 

 thorax and occiput together, increasing very sensibly in breadth 

 to below the middle. The apex is much more obliquely cut 

 away than in O. cyanocephala or the preceding species. The 

 shoulders are full, and hide the margin ; just below them the 

 elytra are deeply excavated, showing, moreover, three deep lon- 

 gitudinal impressions in the bottom of either excavation, and a 

 slight yellowish spot, hardly to be distinguished, at the outer 

 part of it. A round spot of silvery appearance adorns the hind 

 part of either elytron. There are two rows of long thin hairs, 

 placed at considerable distances from each other, on the back of 

 either elytron, and a third just within the margin; the same 

 thin hairs are scattered about the thorax, femora, and elsewhere. 

 The legs are longer and more slender than in O. cyanocephala. 



The Ophionia cyanocephala is not scarce in this part of the 

 island; it affects rather damp, grassy localities, where it mounts 

 upon the stalks of the plants ; this agrees with what Heifer has 

 observed of some species in Bengal, but is quite different from 

 the observations Lacordaire has made with regard to the American 

 species of the genus. However, it is much more frequently 

 taken about the light at night. The two species just described 



