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Show 522 ON DBAG0NFLIE8 FROM SOMALI-LAND. [Apr. 21, point or very short stalk; triangle traversed, 3 rows of post-triangular cells increasing; 3 cells in the subtriangular space; one cross-nervure in the lower basal cell; no supratriangular nervules. Hind wings with the base of the triangle on a level with the arculus; pterostigma yellow, between thick black nervures. This species much resembles 0. ccerulescens, Fabr., and, 0. subfas-ciolatum, Brauer; but the almost unstalked sectors of the arculus on the fore wings remove it from any of the allied species. It is, however, an Orthetrum in its essential characters, and, except in this one particular, exhibits no resemblance to Leptetrum. It is curious that of the three new species in the present small collection, none seem to agree exactly with the described genera; and as I am unwilling to establish new genera on single specimens, I place them provisionally in Orthetrum, to which they seem perhaps most nearly allied. 4. OBTHETRUM PHILLIPSI, sp. n. Long. corp. 35 millim.; exp. al. 51 millim.; long. pter. 2-2-3 millim. Male. Head greenish, the frontal tubercle darker, and the adjacent parts of the upper orbits, as well as the occipital triangle, black ; occiput black above, yellow beneath. Thorax and abdomen wholly pulverulent blue, tbe sutures and carinae lined with black, and the front of the mesothorax with incomplete black shoulder-stripes. Abdomen rather slender, moderately inflated at the base. Legs black; the front legs yellowish on the outside, the others with the coxae and a stripe on the femora yellowish. Lower anal appendage fully -| as long as the upper ones. Wings narrower than in the last species, clear hyaline, the base stained with yellow, especially on the hind wdngs ; membranule white, not bordered with blackish below. Neuration and pterostigma coloured as in the last species; nodal sector and space between the nodal and subnodal sectors similar. Fore wdngs with 11 antenodal cross-nervures, the last continuous, and 8 postnodals, the first two at least not continuous; sectors of the arculus distinctly stalked; triangle traversed, 3 rows of post-triangular cells increasing; 3 cells in the subtriangular space ; one supratriangular nervule. Hind wings with the base of the triangle distinctly within the level of the arculus. A n unusually slender species, much resembling the last superficially, but very distinct. Dobar, Goolis Mountains, Feb. 4, 1895. 5. ORTHETBUM LOBTI, sp. n. Long. corp. 32 millim.; exp. al. 55 millim.; long. pter. 4 millim. Female. Head greenish yellow, the mouth and lower parts darker. Thorax greenish yellow, with a yellowish-white stripe on each shoulder, bordered below by a darker greenish-brown space than the rest of the coloration. Abdomen moderately short and broad, tawny, with a black central carina commencing on the |