The genus Lamia of authors being very extensive, it became 

 necessary to divide it into groups, which have been named by 

 Megerle, and adopted by Latreille and Dejean ; one of these 

 is our genus Monochamus, which may be distinguished by the 

 great length of the antennae in the males, and the toothed in- 

 termediate tibiae, but in the trophi there is little to justify its 

 separation from Lamia. 



The following species have been captured in Britain : 



1. M. sutor Linii., Fab., Schcef. 65. \.—Don. 13. 435. 1. 

 Mr. Marsham first recorded this insect as a native of our 



island, and it is said to be found in July and August upon the 

 trunks of trees. Two or three have been taken in Norwich 

 and the vicinity. 



2. M. sB.v\.OY Fab., Panz. 19. 3. masc. — sutor Panz. 19. ^2. fern. 

 The fine male figured was found upon a post near Surrey 



Chapel, Blackfriars Road, Sept. 1811, and is in the posses- 

 sion of Mr. Samouelle. In the summer of 1812, a specimen 

 was taken at Great Yarmouth, Norfolk ; and about the same 

 time another was captured at Costessey in the same county ; 

 and a fourth is, I believe, in the cabinet of Henry Hole, Esq., 

 of Ebbei'ley House, Devon, in which neighbourhood it was 

 taken in June. 



3. M. dentator Fab.—Ent. Tram. /j. 84<. tab. \.f. 1. 



As few naturalists possess the Fntomological Transactions^ 

 the following remarks relating to this interesting insect may 

 be acceptable. It was exhibited with a ticket bearing these 

 words : " Taken in the area of a house in Gloucester-street, 

 Hoxton, Aug. 10, 1806, and brought to me the next day alive 

 and active. T. G. Ingall." 



" It is more than probable (observes Mr. Haworth) that 

 this fine species, like Cerambyx violaceus and perhaps C.ful- 

 mina7is of Sowerby's British Miscellany, and Stenocorus 

 Ai-maculatus above mentioned, have originally been imported 

 into Britain in timber ; but if such species prove capable of 

 enduring this climate, they become to all intents and purposes 

 natives : and it is impossible to say how many insects may 

 originally have so become inhabitants. It is, therefore, the 

 duty of our Faunists to enrol them as such ; taking good care 

 to notice the peculiarities of their times and places of appear- 

 ance." 



Since the above was written, Mr. Joseph Standish has 

 shown me a fine male taken in Blackfriars Road a few years 

 since. 



The plant is Saxif?'aga tridactylites (Rue-leaved Saxifrage). 



