PROC. ENT. SOC. WASH., VOL. 40, NO. 5, MAV, 1938 125 TWO NEW GENERA OF MYRMELEONIDAE. By Nathan Banks. Among the ant-lion flies of the National Museum collection I have found two new genera. One fine and large species from South America is somewhat like the rare Ripalda insig/iis Rbr., but differs at once in the strongly sinuate hind margin of the front wings. The other from Africa, from which such a great number of genera have been made in recent years, is no less striking than the Neotropical form; it has two definite characters, unusual in African species, no tibial spurs, and a double series of costal cells. CAPOPHANES, gen. nov. Belonging to the Macronemurini; no tibial spurs; the costal area of front wings with two series of cells from near the base to or beyond the middle. One cross-vein in hind wing before the radial sector, latter arising a little before the cubital fork; in fore wing several cross-veins before radial sector, latter arising plainly beyond cubital fork; several of the cross-veins before radial sector connected, and many of those in the area above the first anal vein. The second anal usually connected to third anal for a short distance, third anal forked. Wings rather short and moderately broad, not broadened toward the tips, which are not acute; no distinct banksian lines; angle of cubitus and cubital fork, moderately wide. Legs not very stout, a little stouter than in Gymnoleon; tarsi long, first joint longer than fifth, second somewhat lengthened. Abdomen shorter than hind wings. Capophanes conspersa; «, part of fore wing; h, hind tarsus; r, anal veins of fore-wing of two specimens.