148 Mr. H. W. Bates on the 



160 scales in a series between the cliin and vent. Dorsal 

 scales not larger than the others ; four prseanal scales, the two 

 middle ones largest; subcaudals not enlarged. No trace of 

 limbs. Frontal separated from rostral by a pair of small 

 intervening shields, but forming a short suture with the 

 vertical ; this latter shield is subtriangular in shape, with the 

 posterior side the longest, and forms a very broad suture with 

 an occipital shield, which is likewise triangular, its anterior 

 side being the longest. The first upper labial is very large, 

 ascending to behind the nostril, which is situated in a notch of 

 the rostral. Ear entirely hidden. Black. 



One specimen, from the Zambesi, is 8 inches long, the body 

 being 6£ inches, and part of the tail reproduced. 



XXI. — On the Lonqicorn Coleoptera of Japan. 

 By H. W. Bates, F.L.S. " 



The large collection of Coleopterous Insects made, during a 

 residence of five years in Japan, by Mr. George Lewis, on 

 which the present account of the family Longicornia is 

 founded, furnishes materials for enabling entomologists for the 

 first time to form a definite idea of the nature of the Japanese 

 fauna in this department. Hitherto the number of species of 

 Longicornia recorded from these islands has not reached a 

 score. Mr. Lewis's collection contains 103, the total number 

 now known being 107. Of these, 62 are new species discovered 

 by Mr. Lewis. In a former paper, on the Geodephaga*, I 

 have recorded a similar great augmentation of our knowledge 

 due to the labours of this entomologist, the number of known 

 Japanese species in that group having been trebled by him, 

 and 120 new species added to science. 



With regard to the nature and relations of the Insect-fauna, 

 an analysis of the list of Longicornia quite confirms the 

 leading results arrived at in the memoir on the Geodephaga 

 above cited. In the introductory notes to that paper, after 

 describing the geographical position of the Japanese archipe- 

 lago, and alluding to the views of many Russian and English 

 entomologists in favour of the fauna being considered as 

 forming part of the great Paleearctic province, I showed that 

 the very large mixture of tropical genera and the striking 

 absence of characteristic European and north-temperate forms 

 were opposed to those views. The conclusion implied was 



* Trans. Entom. Soc. 1873, part ii. p. 219. 



