1887.J ON THE PHYTOPHAGOUS COLEOPTERA OF CEYLON. 65 



one side of the urethra; at the anterior extremity of the hone is 

 placed a small rod of cartilage S cm. in length, which gives in the 

 undissected state the impression that the l)one is jointed in the 

 centre. 



There are none of the appendages connected with the glans wliich 

 are present in some of the Rodentia. Cowper's glands are each of 

 about the size of half a pea ; their ducts are of considerable length. 



I wish to express my acknowledgments to Mr. Ilodson for his 

 kindness in executing the accompanying drawings of the teeth of 

 this Rodent. 



2. Descriptions of the Phytophagous Coleoptera of Ceylon, 

 obtained by Mr. George Lewis during the years 1881- 

 1882. By Martin Jacoby, F.E.S. 



[Received December 21, 1886.] 

 (Plates X. & XI.) 



Since the year 1866, when Motschulsky published his descrip- 

 tions of Ceylonese Coleoptera in the 'Bulletin de Moscou,' which 

 included a good many species of the family Phytophaga, only solitary 

 new species of that family have been made known from Ceylon. 

 The present collection, obtained by Mr. George Lewis during the 

 years 1881-82, although not very large in regard to numbers, is 

 nevertheless remarkable and interesting on account of the many 

 new genera which it contains, belonging principally to the sub- 

 families HalticincB and GalerucincE, in which the immense numbers 

 of forms which are nearly always found in every fresh collection of 

 importance, and which cannot be placed in any of the already known 

 numerous genera, add not a little to the difficulties experienced by 

 the monographer in their determination. Motschulsky's descriptions 

 are unfortunately in many instances unrecognizable, being applicable 

 to closely allied species and too short ; and it is therefore probable 

 that several of the species here described as new are identical with 

 one or the other of Motschulsky's species ; but even in that case 

 their redescription will assist in their better recognition. 



If one may judge by the present collection, the Coleopterous 

 fauna of Ceylon seems yet to offer a rich field to a careful explorer, 

 in interesting and beautiful forms. 



Lema ceylonensis, sp. nov. 



Fulvous ; antennae black, the two basal and the two apical joints 

 fulvous ; elytra metallic green or blue, with a deep fovea below the 

 base, finely punctate-striate. 



Length 2 lines. 



Head entirely fulvous and impunctate, the space above the eyes 

 moderately swollen and divided by a shallow groove. Antennae 

 rather more than half the length of the body, the third and fourth 



Proc. Zool. Soc— 1887, No. V. 5 



