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 . hairs, and the antennge are yellowish, andobliquely striated with black at the base ; the first joint iscovered with snow-white hairs. Philopotam^is has three ocelli,and the tibial spurs are arranged thus : 2, 4, 4. In Rhyacopldla the maxillary palpi have the last joint entire,straight, shorter than the rest; while there are three ocelli, andthe tibial spurs are arranged thus : 3, 4, 4. R. fuscula Walkeris rust-red, with some black hairs and a sub
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 . hairs, and the antennge are yellowish, andobliquely striated with black at the base ; the first joint iscovered with snow-white hairs. Philopotam^is has three ocelli,and the tibial spurs are arranged thus : 2, 4, 4. In Rhyacopldla the maxillary palpi have the last joint entire,straight, shorter than the rest; while there are three ocelli, andthe tibial spurs are arranged thus : 3, 4, 4. R. fuscula Walkeris rust-red, with some black hairs and a subfuscous spot oneach side of the thorax. It comes from Hudsons Bay. Another curious Neuropterous insect found in the iron-stoneconcretions of Morris, 111., is the Megathentomum pustulatumof Scudder (Fig. 617, natural size), described and figured byhim in the Paleon-tology of the IllinoisState Geological Sur-vey. The fragmentrepresents a wing (ap-parently an upper one)of a Neuropterous insect. It is gigantic insize, very broad, withdistant nervures, sim-ple infrequent divarica-tions, and in the outerhalf of the wing, whichalone is presented, a. Fig. 617. cross neuration, composed solelj^ of most delicate and irregu-lar veinlets. The wing is also furnished with a great numberof larger and smaller discolored spots, the surfaces of thelarger ones irregularly elevated. Mr. Scudder thinks thewing is allied to that of Coniopteryx, adding it appears tobelong to a family hitherto undescribed. I do not know of asingle insect, living or fossil, wliich approaches it in the struc-ture of the wings.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
