49G Mr. G. A. K. Marsliall on 



captured by Mr. Marshall at Salisbury on April 6, 1898, 

 together with a male of Aciwa douhledayi, var. axina 

 (Fig. 12, Plate XVI), which is one of the many smaller 

 Aeneas, to which it bears a somewhat generalized i-esem- 

 blance on the under-side of its wings in the natural posi- 

 tion of rest, which is nearly but not c[uite represented in 

 Fig. 13 (see the description of the Plate). Mr. Marshall 

 has sent the following acc(junt of the attitude: — 



" i^alishiiry, Feb. 12, 1899. — The Baoris netopha rest with 

 closed wings, and the fore-wings pressed well within the 

 hind-wings so as to hide the wliite spots; they then look 

 much more Acnxa-Wke!' 



The curious reticulate under surface of the hind wings 

 of the isolated and remarkable Hesperid Cyclopides loilkmi 

 is mimetic of the probably distasteful Al/ena njj a ss/e, which 

 possesses a somewdiat similar but much coarser reticidation, 

 Mr. Marshall states that the resemblance is much enhanced 

 in the resting attitude of both species by the concealment 

 of the fore-wings, with the exception of the apex, within 

 the hind. Both species frecpient the same localities, and 

 both rest upon grass-stems. One of each species was 

 captured at Salisbury on Feb. 23, 19U1, and another similar 

 pair on March 3, 1901. 



In thus briuCTiuor tocjethcr Mr. Marshall's examples of 

 mimicry in Hesperidm, it is appropriate to include the 

 following interesting case of mimicry on the part of a 

 Hesperid for a Danaine larva. 



" ^alishnry, March 10, 1898.— The larva of the large 

 ' skipper ' Rhopcdocampta forcdan possesses a colouring 

 wonderfully similar to that of L. chrysippus, though it lacks 

 the filaments. I only know the larvtB of three other 

 species of Hcfipcridie and they are all green ; moreover, 

 they form shelters for themselves, and never come out to 

 feed except after dti.sk ; whereas, although forestall also 

 forms a shelter, yet it I'requeutly cotnes out and feeds in 

 broad daylight, when it is a very conspicuous object." 



The upper-side of Aliena nyassas appears to fit in with 

 the strong combination of black-and-white Ethiopian 

 butterrties belonging to the Danainx and Acraiinx and 

 their Batesian and MiUlerian mimics. Among the smaller 

 of the latter Neptis acjatha is probably to be placed, and 

 this species is on the wing with the much smaller Lyca3nid. 

 Thus Mr. Marshall has sent to the Hope Department 

 specimens of the Neptis captured at Sahsbury on March 



