THE WHITE NILE 417 
female Xylocopa aestuans came on to the steamer and was captured 
by Miss Marriage. 
On the return voyage three days later (Feb. 20th), I got another 
two hours ashore at Ad Duwem, from 8.45 to 10.45 a.m. Butter¬ 
flies were fairly common in and near some gardens a short way up¬ 
stream, but there was a strong wind and many of them were much 
torn. On this occasion Danaida chrysippus put in an appearance 
and I took a male, a fine specimen of the alcippus form with hardly 
any fulvous upon the hind-wing; it had the characteristic odour of 
the species strongly developed. The most conspicuous insect how¬ 
ever was Teracolus protomedia, which was common enough, but not 
very easy to catch in the high wind, though I managed somehow 
to secure nine, all males. This butterfly seemed to be especially 
attracted by the red flowers of a Caesalpinia (Nat. Ord. Legumin- 
osae) in one of the gardens ; in three of the specimens I detected a 
scent, slight but distinct, which was noted at the time as “ a some¬ 
what unpleasant, stuffy smell/’ “ a slight scent, scarcely agreeable,” 
“ distinct, dusty, hard to describe.” The commonest butterfly would 
appear to have been Teracolus daira, of which I brought away five 
males and three females, one of the former being a dwarf, a female 
is recorded as having had a clove-pink scent, both in the field and at 
home. Of T. halimede I got one female; of T. (?) liagore, Klug, a 
male. This last must be a very rare species. Dr. Dixey told me 
that he had never seen a specimen, but he thought that my insect 
must be Klug’s liagore} I also took five males of Belenois mesentina, 
three of which had a slight, somewhat hay-like scent. 
The flowers of Parkinsonia (Nat. Ord. Leguminosae) attracted, 
besides the common Xylocopa aestuans, and Eumenes tinctor, the 
large handsome grey, black and white Bee, Podalirius nubricus, Lepel., 
of which I secured one of each sex; in company with these was 
a Podalirius that Mr. Morice thinks likely to be the undescribed 
male of P. incanus , Klug, of which I seem to have taken the female 
in the suburbs of Khartum at the same flowers. 
Late at night we reached Kosti, 192 miles from Khartum. This 
is the place that is often called after the name of the district, Goz 
Abh Guma. Quite a number of insects came to the lights of the 
steamer during the evening. Among them was Girphis loreyi, a 
rarity in England, but common enough in Egypt. There were also 
two specimens (? males) of a Trichiura placed by Sir George 
1 Miss Sharp, “ Monograph of Teracolus,” 1901, p. 127, considers T. liagore, Klug, 
to be the dry-season form of T. daira , Klug, and Mr. Walter Rothschild seems to 
concur. 
2 E 
