1917.1 NATURAL SCIENCES OF PHILADELPHIA 251 NOTES ON MEXICAN MELANOPLI. (Orthoptera; Acrididse.) BY MORGAN HEBARD. In preparing a Revision of the Melanopli of North America, north of IMexico, it has been found necessary to consider all of the Mexican material at hand. We have before us the greater portion of the important material, including almost all the types, described by Scudder in his Revision of the Orthopteran Group Melanopli and by Bruner in the Biologia Centrali-Americana; the papers here referred to being the most important single contributions to the knowledge of this group for Mexico. The Philadelphia collections contain other types and important series previously recorded from ^Mexico. In addition, we have fortunately been able to assemble nearly all the recently collected Mexican Melanopli and take the present opportunity to record the same. It is clear that great numbers of species of the Melanopli, found in the southern portions of the United States, will be found in northern JNIexico, but as yet have not been taken in that country. In fact, the Melanopli assembled show that generally casual collecting has been done, a very few localities fairly well investigated, wdiile vast areas still remain virtually unknown for this group. The last condition is particularly true for all the regions of Mexico adjacent to the United States. We would hesitate to report on collections so evi-dently incomplete were it not necessary to point out the considerable synonymy proven by the series at hand. Five genera and ten species are shown to be synonymic in the present paper. A single new species is described. Four hundred and thirty-nine specimens, representing fourteen genera and thirty-six species, are here considered. The superficial character of Scudder 's Revision is best shown by the array of errors in his treatment of the species of the United States. The errors applicable to Mexican material, for which he erected two generic and six specific synonyms, did not come as a surprise after the other portions of his work had been studied.^ 1 The new genera and species, described by Scudder in his Revision (December 28, 1897), all actuallj^ date from the key which was separately printed in advance, in the Proceedings of the American Philosophical Society, XXXVI, pp. 5 to 35, (April 5, 1897). 18
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