. The life of North American insects [microform]. Insects; Insectes. ORDER V. NET-WINGED INSECTS. 215 mained unanswered longer than it should have been, and I now improve a leisure hour to fulfill this duty. " Just now, at Professor Agassiz's request, I have been revising the Neuroptera, and have become much interested therein. Some of the German naturalists (Erichson, etc., etc.) have undertaken to break up this order, leaving there- in only those genera which undergo a complete transforma- tion, and have inactive pupas, such as Semblis, Coi-ydalis, Chaulisdes, Raphidia^ MaJitispa, Ifetn
. The life of North American insects [microform]. Insects; Insectes. ORDER V. NET-WINGED INSECTS. 215 mained unanswered longer than it should have been, and I now improve a leisure hour to fulfill this duty. " Just now, at Professor Agassiz's request, I have been revising the Neuroptera, and have become much interested therein. Some of the German naturalists (Erichson, etc., etc.) have undertaken to break up this order, leaving there- in only those genera which undergo a complete transforma- tion, and have inactive pupas, such as Semblis, Coi-ydalis, Chaulisdes, Raphidia^ MaJitispa, Ifetnerobius, Myrmeleon, As- calaphus, Bittacus, Panorpa, and Flmjganea; and they trans- fer Psocus, Termes, Ephemera, Libellula, Perla, etc., to Or- thoptera, or put them among the Blatta, Mantes, Spectra, and Gi^lli! ^ ' " Linnaeus evidently regarded Libellula as the type of his order Neuroptera, and this genus seems to have nothing in common with the Orthoptera save a remote resemblance in the structure of the labium and labial palpi, and the im- perfect transformation. This transformation, also, is not analogous to that of Orthoptera, excepting only in the fact that the pupae are active and take food; in other respects they arer entirely unlike the perfect insects, whereas the pupae of the Orthoptera closely resemble the perfect insect, with the exception only of wanting fully-developed wings. Hence I maintain that the Libelluladae can not with any propriety be put among Orthopterous insects. " Libellula is closely connected in organization and hab- its with other Neuroptera, and hence, if it be retained in this latter order. Ephemera, Perla, Termes, etc., must remain also. My knowledge of these insects, in their various states, is probably equal to that of the Berlin entomologists, and therefore I feel authorized to put my own judgment and ex- perience on the subject against theirs. Without going very deeply into particulars, allow me to contrast the characters of Ort
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