226 
SOUTH-AFRICAN BUTTERFLIES. 
233. (1.) Deloneura immaculata, Trim en. 
Deloneura immaculata, Trim., Trans. Ent. Soc. Loud., i868, p. 83, pi. 5, 
f. 4. 
Exp. al, I in. 5-9 lin. 
Ochreous-yelloio, ivitJiout markings of any hind. Under side. — 
Hind-wing and an ill-defined costal, apical, and hind-marginal border 
rather paler. 
Head, with palpi and antennas, dull-black, — the former with two 
spots on forehead, two on summit, and two behind eyes ochreous- 
yellow ; antennse tipped with ochreous-yellow. Thorax dull-black, with 
pale ochreous-yellow scales and short hairs superiorly, and four or five 
ochreous-yellow spots laterally. Abdomen ochreous-yellow, mixed with 
fuscous superiorly. 
The three examples discovered by Colonel Bowker at the end of December 
1863 at Fort Bowker, on the Bashee River, remain the only known represen- 
tatives of this remarkable butterfly. The first specimen was captured on the 
27th December, and the other two during the remaining days before the ist 
January. Colonel Bowker described the insect as very rare, and only appear- 
ing for a few days ; specimens were also most difficult to procure, owing to 
their habit of " whirling slowly with flapping wings round the tops of trees, 
rising and falling, sailing away and returning." He was struck with its resem- 
blance to the "yellow tree-moth" — I believe a species of Area (a day-flying 
Liparide form allied to Orgyia) — which abounds in the wooded parts of South 
Africa, and it is not impossible that Deloneura mimics these probably pro- 
tected moths, and so may escape notice among the companies of the latter. It 
must be observed, however, that Colonel Bowker has in vain looked out for 
the butterfly during all his subsequent years of active search in the various 
forest- clad districts he has visited ; and I tliink it unlikely to have escaped 
the notice of so practised a collector if it were really native to those tracts of 
country. 
Locality of Deloneura immctcidata. 
I. South Africa. 
D. Kaffraria Proper. — Bashee River (/. //. Boivlier). 
Genus AERUGIA. 
Arrugia, Wallengren, K. Vetensk.-Akad. Forhandl., 1872, p. 47. 
IZeritis, Trim., Rhop. Afr. Aust., ii. p. 278 (1866). 
l^ikGO.—Head small, — narrower in $ ; pcdpi long, with both second 
and terminal joints longer in $ ; antennae short or very short, thick, 
blunt at tip,- — in J gradually incrassate from base, in $ of almost equal 
thickness from very near base. 
Thorax very or exceedingly robust in ^, and not much less so in 
Wings rather elongate, quite entire ; fore-ivings with costa nearly 
straight, a little deflected at apex; hind-margin slightly convex in 
decidedly so in $ ; subcostal nervure four-branched, — the first and 
