( 119 ) XIV. Characters of undescrihed Dijjtera in the Collection of W. W. Saunders, Esq., F.R.S., &;c. By Francis Walker, Esq., F.L.S., (fee. [Read 2nd February, 1857.] Having been favoured by the kindness of Mr. Saunders with the opportunity of describing the new species of Exotic Diptera in his collection, I beg leave to offer the MSS. to the Entomological Society; Each family is accompanied by a synopsis of some or of all of the genera contained in it, excepting those which have been lately registered in the 1st, 2nd and 3rd parts (2nd series) of the British Museum Catalogue of Diptera. BRACHYCERA. Fam. 1. STRATIOMID^. In the British Museum Catalogue of i)i2'^er«, 2nd series, Part I. about 379 species of this family are enumerated. The first and third numbers of the Journal of the Proceedings of the Linnean Society contain descriptions of eleven additional species of three new genera discovered in Malacca, Singapore and Borneo by Mr. Wallace. Macquart, in the Fourth Supplement to his " Dipteres Exotiques," describes about twenty-five new species and three new genera (Heteracanthta, Toxocera and Camj^eprosopa), and lastly, Loew, in the Verhand. Zool. Botan. Verein in Wien, v. (1855), gives a synopsis of the genera, to which he adds the five follow-ing :— 1. Plecl'icus. Type, Sargns testaceus, Fabr, Four new species, of which PI. apicalis is synonymous with Sargiis luridus. Walk. Journ. Proc. Linn. Soc. 1, 8. 2. Merosargus. Type, Sargus fasciatus, Fabr. Two new spe-cies. 3. Chrysonotus. Type, Sargus bipunctatiis, Scop. 4. Microchrysa. Type, Chrysomyia polka, Linn. 5. Analcocerus. Type, A. nigriceps, Loew. One new species. The eleventh volume of the Linnsea Entomologica contains " Beitrag zur Kenntniss exotischer Stratiomyiden von Dr. A.