Guide to the study of insects and a treatise on those injurious and beneficial to crops, for the use of colleges, farm-schools, and agriculturists . Wing of Paolia vetusta. this wing differs so much in neuration from any family ofrecent insects, that it is difficult to i)oint out any near affinitywith living forms, although it shows some points of resem-blance to several families of Neuroptera, and especially to theEphemerids. To Hemeristia and 3Iiamia, he adds, it showsmore resemblance, but still differs more from either of thesegenera, which are considered distinct families by Mr. Scudder,th
Guide to the study of insects and a treatise on those injurious and beneficial to crops, for the use of colleges, farm-schools, and agriculturists . Wing of Paolia vetusta. this wing differs so much in neuration from any family ofrecent insects, that it is difficult to i)oint out any near affinitywith living forms, although it shows some points of resem-blance to several families of Neuroptera, and especially to theEphemerids. To Hemeristia and 3Iiamia, he adds, it showsmore resemblance, but still differs more from either of thesegenera, which are considered distinct families by Mr. Scudder,than they do from each other. It seems still more allied loDictyoneura libeUuloicles of Goldenberg, Prof. Hagen consider-ing it, with Eugereon Bockingii Dohrn, as a species of thisgenus. In both Dictyoneura and Eugereon, as figured, thewings have considerable resemblance to the specimen fromIndiana, but in neither of them are the nervures so numerously. INJURIOUS INSECTS. AllKNDIX 711 branched towards the posterioi- Ixjider of the win<^, and inEugereon the spaces between the first three nervnres nextthe anterior border are connected b^^ straight are also important differences in the branchinir of themain nervures. Abdominal Sense Organs. — On p, 17 the remarkableantenniform abdominal appendages of Mantis tessclUittt ar-e fig-ured as an illustration of what we have called sensori<»-geni-ital organs. Dr. Dohrn has shown that the jointed abdominalappendages of Gryllotalpa are true sensory organs. Morerecentl}^ we have observed sense organs (probably of smell)in- the anal stylets of the cockroach {Periplaneta ^imeriaina)..,.consisting of about ninety minute sacs, situated in single rowson the upper side of each joint of the stylets. They are likesimilar organs in the antenme of the same insect. Similarorgans are situated on the female anal stylets of Chrysopila^ aLeptis-like &y. These also are like the s
Size: 1191px × 2097px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
