Dec. 1899.] COQUILLETT : On NoRTH AMERICAN TRYPETIDyE. 25'.* Aspidistus scutiformis Ckll. — On a Citrus fruit from Acapulco, Mexico. (]om. Craw, who quarantined it at Safi Francisco. Aspidistus dictyospermi Morgafi. — On Pandamus in green-house, Santa Fe, New Mexico. Coll. Ckll. On Areca lutescens in greenhouse, Columbus, Ohio. Coll. J. S. Hine. Also found at Columbus in 1896 by Prof. Bogue. NOTES AND DESCRIPTIONS OF TRYPETIDiE. By D. W. Coquillett. In the Wiener Entomol. Zeitung for 1882, page 192, Osten Sacken states in substance that Trypeta, Meigen, 1803, is a synonym q{ Trupanea Guettard, 1756, and of Schrank, 1798. Guettard used the term in a popular sense, and did not refer to any previously described species, nor did he give specific names to any of the species of which he wrote. His paper, therefore, must be regarded as a popular one, which does not in the least affect our binomial nomen-clature. Moreover, it appeared two years earlier than the tenth edi-tion of Linne's Systema Naturae, which the majority of naturalists have adopted as the starting point of our nomenclature. As to Trupanea Schrank, Osten Sacken overlooked the fact that this genus appeared in the third volume of that author's work, which was published in the year 1803, the same year in which Trypeta appeared. In a case of this kind, later writers are at liberty to choose either of the two names ; and since Trypeta has been very generally adopted in the past, there is no good reason for not following this course. At the time of treating of our Trypetid?e, Dr. Loew separated them into smaller groups which he sometimes referred to as genera but quite as often as subgenera, and as subgenera they are listed in the Osten Sacken catalogue. By changing some of the species, however, the greater part of the groups proposed by Loew are well worthy of being considered as valid genera. Acrotoxa Loew, is a synonym of Anastrepha Schiner, as given in the Osten Sacken catalogue ; but the African genus Leptoxyda, or Leptoxys Macquart, which is also given as a synonym, evidently is not the same genus, owing to the course of the fourth vein. The
BioStor
