. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Miscellaneous. Ill On a Chilian Example of Pterodela pedicularia, L., with doubly abnormal Neuration. By Alfred Giard, Professor at the Sorbonne. In the numerous consignments which our colleague Mr. F. Lataste has kindly sent me for the study of Margarodes vitium I have found at different times the larvae, nymphs, and perfect insects of a Psocid which is common in Chili on old vine-stocks, especially at Caillihue and Santa Rita. This is Ciecilius pedicidarius, L., which Jvolbe
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Miscellaneous. Ill On a Chilian Example of Pterodela pedicularia, L., with doubly abnormal Neuration. By Alfred Giard, Professor at the Sorbonne. In the numerous consignments which our colleague Mr. F. Lataste has kindly sent me for the study of Margarodes vitium I have found at different times the larvae, nymphs, and perfect insects of a Psocid which is common in Chili on old vine-stocks, especially at Caillihue and Santa Rita. This is Ciecilius pedicidarius, L., which Jvolbe has made the type of the subgenus Pterodela. The species is widely distributed in Europe on old wood of various kinds and even in dwellings, where the imago is seen from the end of August to about the 15th of October. In Chili the perfect insect commences to appear about the month of December, and at this period there still exist many untransformed larvae. These Chilian examples do not differ from those of the old world. Their size is perhaps a little less and the pterostigma a little more cloudy. It seems to me evident that this Psocid has been introduced into Chili with some vegetable debris, perhaps with the vines themselves. It is not mentioned in tho list of Neuroptera in C. Gay's ' Histoire Naturelle du Chili.' By a singular coincidence the first adult example which I received from 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 Ciecilius pedi- cularius, L., and my doubts only vanished later when M. Lataste sent mo fresh and perfectly normal specimens. The study of teratological cases in the neuration of insects presents considerable interest from the point of view of biological philosophy. It is important not to lose the documents which nature has furnished us with in so unusual a manner, and for this reason I have thought it advisable to describ
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