478 Mr. George Lewis on a 



the vegetation, for the Formicidce are arboreal. The 

 nests are seen everywhere under bark, or in the trunks 

 of trees, and some draw the fohage together some feet 

 from the ground for an habitation. And Paussidce are 

 the associates of ants. 



As some of my captures (about 1200 species) are 

 hkely in due time to be described, I give for the informa- 

 tion of authors and others a table of the localities I 

 visited, and the dates of my sojourn : — 



Altitude. 



Galle ... . On coast level Nov. 27 to Dec. 4,1881, 



Dikoya . . . 3800 to 4200. Dec. 6 to Jan. 16, 1882. 



Kitulgalle . . 1700 . . . Jan. 17 to Jan. 20, ,, 



Dikoya . . . 3800 to 4200. Jan. 21 to Feb. 7, „ 



Nuwara Eliya . 6234 to 8000. Feb. 8 to Feb. 11, „ 



Dikoya , . . 3800 to 4200. Feb. 13 to Feb. 16, „ 



Kandy. . . . 1546 to 1727. Feb. 17 to Feb. 23, „ 



Dikoya . . . 3800 to 4200. Feb. 25 to Feb. 27, „ 



Bogawantalawa . 4900 to 5200. Feb. 28 to Mar. 12, „ 



Balangoda . . 1776 . . . Mar. 13 to Mar. 16, „ 



. Horton-Plains . 6000 approx. Mar. 18 to Mar. 20, „ 



Bogawantalawa . 4900 to 5200. Mar. 21 to Apl. 4, „ 

 Kandy .... 1546 to 1727 . Apl. 6. 



Colombo . . . On coast level Apl. 7 to Apl. 27, ,, 



Section I. — Galle and Colombo lie on the shore, and 

 the neighbourhoods of both these ports are rich in 

 species, and the majority of them can be put into three 

 classes : — 



(a). The arboreal and herbaceous species, of which 

 many occur also " up-country," and others which infest 

 the palms and vegetation peculiar to the coast. 



(b). The ordinary forms of marsh species, which assimi- 

 late to those of more northern regions, and which also 

 occur generally throughout Ceylon. 



{c). Some curious sand and river species (Selina 

 Westermanni, Mots., &c.), none of which could exist 

 with their present instincts and habits in dense jungle, 

 for they are fitted for open places of mud and sand, such 

 as estuaries of rivers or banks by the sea. They are far 

 removed from the Be)iihidia, Di/scliirii, &c., classed here 

 as immigrants, and of their origin two questions arise. 

 Have their ancestors come from India ? or are they 

 endemic, modified from ancient, forms during the forma- 



