NOTES ON- BUTTERFLIES OF ADEN. ' 213 



it is the only occasion on which I met with this butterfly out of 

 Aden proper. I made my first acquaintance with this species on 

 Christmas Day, 1883, near Round Island, and the following incident, 

 though it has nothing to do with butterflies, maybe interesting, viz., 

 the seeing of the Aden monkeys on that day— the only time 

 between November, 1882, and March, 1885, I saw them, although I 

 frequently heard them. On this occasion there were three, a male 

 (a splendid fellow), a female, and a half-grown butcha, and they 

 were climbing up the rocks near the steep headland on the Gold 

 Mohur Valley side of the bay. During 1869 and 1870 I frequently 

 saw the monkeys, and at that time the flock numbered probably 

 from 12 to 20 members. I have thought this worth recording, as 

 there are many people who are sceptical as to the existence of 

 monkeys on the rock. 



Family — PAPiLiONiDiE. 

 Subfamily — Pierinee. 



23. Terias c7ialcomi(eta, Butler, Ann. and Mag. Nat. Hist., sor. 5, 

 vol. iii, p. 190, n. 10 (1879). Common at Lahej and Haithalhim. 



24. Caiopsilia florella,FabTicms,Byst. Ent., p. 479, n. 159(1775). 

 Catopsilia aleurona, Butler, Ann. and Mag. Nat. Hist., ser. 4, 



vol. xviii, p. 489 (1876). 



Catopsilia hyhlcea, Boisduval, Sp. Gen., Lep., p. 612, n. 31 

 (1836). 



Catopsilia pyrene, Swainson, Zool. 111., 1st ser., pi. 51 (1820-21). 

 I have lumped these four forms, as at Aden they seem so linked 

 together as to be inseparable. All four forms are very common 

 (particularly at the forest!) at Shaik Othman, e.g. "9-3-84, 

 G. pijrefie swarming on the Cassia bushes." 



The next genus — Temcolus — being essentially a desert form is 

 naturally well represented in the neighbourhood. Col. Swinhoe, 

 P. Z. S., 1884, page 434, writes of this genus in a manner which 

 appears to me to be misleading, as he seems to imply that Tcracoli 

 are in the habit of sitting and basking on burning sand and rock 

 (as one sees P. cardui and some o£ the Junonice, and Vdnessidce do) . 

 The family does doubtlessly inhabit some of the hottest and most 

 desert-like spots on the face of the globe, but so far as my experience 

 goes Teracoli never alight on the ground, but on a stem of grass or 

 28 



