28 “THE ENTOMOLOGIST. 
female, labelled ‘‘ Gambia” in the British Museum, which would 
point to a range nearly as restricted as that of the last species ; 
this female exactly agrees with Brullé’s description in every way, 
especially in the red basal segment and the terebral length of 
twelve millimetres, not only eight as indicated by Tosquinet. 
The species referred to under the present name by Col. Bingham, 
(Trans. Zool. Soc. xix. 1909, p. 179) from Mount Ruwenzori, is 
O. gigas, which was at that time mistaken for it in the National 
Collection. The coloration of O. flavipes is quite distinctive :— 
Head, thorax, scape and extreme apices of antenne rosy; the 
last with only two joints white; mesonotum and metanotum 
sometimes more or less, but never entirely, nigrescent; abdomen 
black, with the basal segment entirely red; legs ferrugineous 
with the hind femora, tibie and tarsi black, the basal half of 
their tibiz and second to fourth tarsal joints very pale flavous ; 
wings brownish, not at all nigrescent, but with violaceous 
reflection ; length, female, 25 mm. 
TWO new MYRMECOPHILOUS APHIDES rrom ALGERIA. 
By Frep. V. Tueosatp, M.A., F.E.S., Hon. F.R.H.S., &e. 
Tur two new Aphides described here were taken by Mr. P. 
A. Buxton and Mr. R. Gurney in ants’ nests in Algeria; one of 
them was also found with termites. So far only a single aphid 
has been recorded from the nests of white ants, namely, T'ermit- 
aphis circumvallata, Wasmann (Tijdschr. v. Entomol. xlv. 1902, 
pe 10o,) plrg, ies. Te airsCh) 
Professor Robert Newstead informs me that he is describing 
another peculiar form from termite nests in the West Indies. 
One of the two species described here is very marked, and 
this I have placed in a new genus for which I propose the name 
Rectinasus. The other comes in the genus Forda, although the 
adult female presents a somewhat different form to the other 
known Fordas. The ant hosts are given with the species 
described. 
Genus Recrinasus, nov. gen. 
Antenne of five segments, long, often over half the length of the 
body, rather thin, the first and second segments small, of about equal 
length, third and fifth long, about equal in length, fourth short, 
slightly longer than the second, the first and second have a short 
blunt spine, at the apex and base respectively. Hyes small. 
Proboscis long, from two-thirds the length of the body to a little 
longer than the body, carried at a marked angle to the body, often 
nearly at right angles ; acuminate, hairy. Setaceous mandibles and 
maxilla long. Body segmented. Cornicles absent. Legs rather 
. long and thin, but somewhat thicker in young forms. 
* This insect has since been placed in a new family. 
