( 165 ) XI . Descriptions of a new cjenns and four new species of Calopterygidae, and of a neiv genus and species of GomphidsB. By R. McLachlan, F.L.S., Sec. Ent. Soc. [Bead 2nd May, 1870.] In the course of an arrangement, which I have recently completed, of the Odonata belonging to the family Calop-terygidce in the collection of the British Museum (with which is incorporated that of Mr. Wilson Saunders), I found, among others, the four new species herein de-scribed, one of which forms the type of a new genus. And I have added a remarkable new form of Gomphidce, from my own collection, pertaining to the singular genus Petalia, taken in its broad sense. The species described are as under: — Calopterygid^. Psolodesmus (n. g.) mandarinus . . Amoy. Euphcea compar ..... Amoy. Mieromerus bisignatus . . . . Celebes. Chalcopteryx scintillans . . Upper Amazons. GOMPHID^. Hypopetalia (n. g.) pestilens . . . Chili. Fam. CALOPTERYGID^. Psolodesmus, n. g. Belonging to the "Legion" Calopteryx (De Selys). Form of Calopteryx (sens, strict.) . All the wings pro-vided with a. large, subquadrate, dilated pterostigma ; quadrilateral slightly convex on its upper margin, and slightly dilated at its extremity ; basal space empty ; arculus angulate; inferior branch of the second sector of the triangle running obliquely into the inner margin in an unbroken line ; all the sectors much ramified and curved at their extremities (in other words, there are 5-6 supplementary sectors between each leading one) . First joint of antennae very short. Legs with very long spines. {S ■) TRANS. ENT. SOC. 1870. — PART II. (jUNE.)
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