The annals and magazine of natural history : zoology, botany, and geology . tle less and the pterostigma a littlemore cloudy. It seems to me evident that this Psocid has beenintroduced into Chili with some vegetable debris, perhaps with thevines themselves. It is not mentioned in the list of Neuropterain C. Gays Histoire NatureUe du Chili, By a singular coincidence the first adult example which I receivedfrom Caillihue, a male, presented an abnormal neuration, and ab-normal in a different manner in each of the two anterior wings,so that I was some time in recognizing our common Ccecilius pedi-
The annals and magazine of natural history : zoology, botany, and geology . tle less and the pterostigma a littlemore cloudy. It seems to me evident that this Psocid has beenintroduced into Chili with some vegetable debris, perhaps with thevines themselves. It is not mentioned in the list of Neuropterain C. Gays Histoire NatureUe du Chili, By a singular coincidence the first adult example which I receivedfrom Caillihue, a male, presented an abnormal neuration, and ab-normal in a different manner in each of the two anterior wings,so that I was some time in recognizing our common Ccecilius pedi-cularius, L,, and my doubts only vanished later when M, Latastesent me fresh and perfectly normal specimens. The study of teratological cases in the neuration of insectspresents considerable interest from the point of view of biologicalphilosophy. It is important not to lose the documents which naturehas furnished us with in so unusual a manner, and for this reason Ihave thought it advisable to describe and carefully reproduce thewings of the abnormal Ccecilius of Chili,. If we compare the left wing of the abnormal specimen (fig. 1)with the left wing of a normal individual (fig, 3), we see that thesecond posterior marginal cellule (B) is wanting, the median nervuresending only one branch to the margin of the wing instead of is a simplification of the neuration which is only met with inthe normal state in the inferior wing in the Psocids (cf. fig. 4, theinferior wing of Cceciliiis pcdicidarius). De Selys Longchamps has described an analogous monstrosity in aPsociis bipunctcttus, Latr., from the Rambur collection. In thegenus Psocus there are normally four posterior marginal cellules. In 112 Miscella neous, the abnormal specimen the left superior wing has only three mar-ginal cellules instead of four, the most basal being absent. Themonstrosity was thus of the same nature and affected the same sideas in our C. pecUcularius *. The right wing of our teratological example p
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