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 . wingsis broader at the base, with a re-current forked vein ; the transverseseries of venules are gradate (likea pair of steps). We have found inMaine a larva (Fig. 599, tergal andside vieAv) of this genus on the barkof a birch tree in October, where itwas seen preying on Aphides, andhad covered its abdomen with theempty skins of its victims, forminga thick mantle as seen in the alternatus Fitch is whiteor yellowish, varied with
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 . wingsis broader at the base, with a re-current forked vein ; the transverseseries of venules are gradate (likea pair of steps). We have found inMaine a larva (Fig. 599, tergal andside vieAv) of this genus on the barkof a birch tree in October, where itwas seen preying on Aphides, andhad covered its abdomen with theempty skins of its victims, forminga thick mantle as seen in the alternatus Fitch is whiteor yellowish, varied with fuscous,with tawny hairs. According toFis-r>07- Fitch it is found upon pine and hemlock bushes. //. occidentaMs Fitch has hyaline wings, notmottled as usual with smoky dots or clouds, but adorned withtwo faint parallel lines ; it expands .38 of an inch. I haveraised specimens, referred to this species by Dr. Hagen,which occurred in the pupa state (Fig. 600), in considerablenumbers under1 a cloth wrapped around a pear tree in agarden in Salem. The cocoon is oval, cylindrical, dense, andsurrounded by a much thinner mass of silk more globular. HKMEKOBID^E. 611 in form. The partially active pupje crawled out of the co-coons, and were found scattered about in the paper containingthem. The genus Potystoechotes is of much larger size than Heme-robius or Chrysopa, and Hagen suggests that the larva isaquatic. P. punctatas Fabr. is widely distributed,flying lazily at night-fall. The aberrant genus Man-lisjHi, is a most interesting form, from the great lengthof the prothorax, which with other characters remindus strikingly of the Orthopterous genus Mantis. Thefore legs are, like those of Mantis, adapted for insects. Mantispa brinmea Say is our mostcommon species, occurring in the Middle and WesternStates and southwards to Central America. Chrysopa (Fig. (501, eggs, larva, and adult of a of Europe), the Lace-wingedFly, is abundant and of great use, asin the larva st
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishe, booksubjectinsects
