184 Mr. J. O. Westvvood's Monograph XXVIII. Monograph of the Genus Panorpa, with Descrip-tions of some Species belonging to other allied Genera. By J. O. Westwood, F.L.S. [Read 5th May, 1841.] A VALUABLE Monograph on the family Panorp'idce having been recently published by Dr, F. Klug, in the " Transactions of the Berlin Academy for 1836," I have thought that it would be both useful and interesting to give descriptions of such new species of this family as I have met with in the principal collections of London, by way of supplement to the memoir of the learned pro-fessor of Berlin. In the monograph above mentioned are described thirteen species o{ Nemoptera, (which genus is however correctly regarded as not naturally belonging to this family,) five of which, from Caffraria and Arabia, are new ; eleven species of Billacus, eight of which, natives of the Cape of Good Hope, Senegal, Mexico, Chili, Brazil and New Holland, are new ; and seven species of Panorpa, two of which, from Mexico, are new. In the genus Boreus is contained only the B. hyemalis. And, lastly, a new genus is established under the name of Chorista, founded upon an Australian species (C. Australis, Klug), resembling the ordinary Tanorpce in size, but not having the front of the head rostrated, although the parts of the mouth are analogous to those oi Panorpa. The female only of this interesting insect has yet been recorded. Still more recently Dr. Burmeister has published the description of another new species of Panorpa from the East Indies, in his " Handbuch der Entomologie." Such is the extent of our present knowledge of this family. It is therefore with pleasure that I am able to add considerably not only to the species but even to the genera of this family, I regret, however, that 1 am unable to add any further account of the preparatory states of the species than is contained in my " Introduction to the Modern Classification of Insects." Since that work was published a very elaborate memoir on the internal anatomy of the common species has appeared in the " Annals of Natural History," published in Holland by Van der Hoeven.
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