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wing behind M', the distance is onl_v <! mm. in the ? ? from Mombasa, the band 

 being broader in these individuals (1 1 mm.) ; on the hind wing the band is also very 

 wide in the latter specimens, the black outer area of the wing measuring only 8 mm. 

 at M', the band is 15 mm. wide at M- in one specimen, 10 mm. in the other ; the 

 discal bar M- — SM" separating the white band on the underside of the forewing 

 from the yellow lunnle is very thin, being comiwsed of scattered black scales, and 

 the median liar M" — SM- is less oblique than in the ? ? from other places. 



A ? in the Berlin Museum from Usaramo, German East Africa (Stnhlmann) 

 agrees fairly well with the Mombasa examples. It is possible that the differences 

 here pointed out will be fonnd to be more or less constant. 



Dr. Trimen (I.e.) gives the following description of the larva and the habits of 

 C/t. cit/iaeron : — 



" Labva. — Deeper or lighter green, closely granulated with yellow, on back ; 

 light bluish green or light bluish grey on under surface ; a chrome-yellow lateral- 

 inferior stripe from second segment to anal extremity, which is bifid into two acute 

 processes of the same yellow as the stripes. On sixth and eighth segments the 

 yellow stripes are connected by a backward-cnrved, almost semicircular, transverse, 

 yellow stripe ; on back, just preceding the hinder portion of each transverse stripe, 

 a dark purple spot, composed of two small spots connected by indistinct purple 

 lineolae. On each side of eleventh segment, a small yellow spot, just above 

 longitudinal stripe. Head rather large, green, surmounted by four serrated green 

 horns (of which the two middle ones are longer than the others and divergent) ; face 

 and outer edge of horns bordered with yellow ; between the two middle horns a pair 

 of small, acute, black-pointed tubercles. Feeds on the flat-crown acacia {Zi/yia 

 fastigiata) in March and April. 



" Pupa. — Light green, slightly maculated with white. A silvery white line 

 running along curved edges of wing covers to summit of head, interrupted on the 

 line of the antennae. Anal segment produced, and bearing three pairs of small 

 jiointed tubercles. 



" The above description of the larva and pupa are made from notes and drawings 

 of Natalian specimens communicated to me by Captain H. (_'. Harford and Mr. W. D. 

 Gooch. The former gentleman wrote that he found several of the larvse almost full- 

 grown in the month of April, and that shortly before becoming pnpiu they changed 

 to a very light green. The butterflies were disclosed after thirteen days' pujiation. 



" This close ally of C. xipliares (Cram.) is readily recognised by the characters 

 given above, which appear to be quite constant. It seems also to be quite a local 

 form, as I have seen no examples except from the coast of Natal, and have found no 

 record of its occurrence elsewhere. 



"At D'Urban, Port Natal, cithaeron is of very frequent occurrence. From the 

 middle of February to the beginning of April 1867 I observed many specimens of 

 both sexes, frequenting chiefly the ' sucking places ' on tiie stems and branches of 

 Zygia fastigiata (the flat-crown acacia), on which tree, as abiive noted, the larva 

 lives, and of Acacia lebheck. Another favourite resort of this butterfly was an 

 exudation on the stem of Oiicoba spinosa in the Botanic Garden. In habits and 

 flight it entirely resembles its close congener. I observed a specimen on the wing on 

 June 23rd, 1S05; and Colonel Bowker has taken examples in the mouth of August ; 

 but they are only numerous in the summer months. When within reach, specimens 

 engaged in feeding are easily captured. The paired sexes were taken by Colonel 

 Bowker, and sent to me in August 1881." 



