. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. 212 IIUIH Si'IIOOL ZOOLOGY. .1 Winged inBoctH (Neuroptera), and, to diHtinguish thorn from theH<», the forms rtjfcnvd to aro called Paeudo-iieiiropUra. Belonging liere are the dnigon-fliea {Lihellnlidip)^ Muy-fli(;s (Ephevierida;), stono-flios (Perlidcr:)^ all of which huvo a(iu!itic larva) (into the trachetu of which air is absorlnid through jK^culiar expansions of the bo<ly-wall known as tracheal gills), hnt th(5rc aro alpo forms with terrestrial larvce, such as tho Psocidie (very small inse
. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. 212 IIUIH Si'IIOOL ZOOLOGY. .1 Winged inBoctH (Neuroptera), and, to diHtinguish thorn from theH<», the forms rtjfcnvd to aro called Paeudo-iieiiropUra. Belonging liere are the dnigon-fliea {Lihellnlidip)^ Muy-fli(;s (Ephevierida;), stono-flios (Perlidcr:)^ all of which huvo a(iu!itic larva) (into the trachetu of which air is absorlnid through jK^culiar expansions of the bo<ly-wall known as tracheal gills), hnt th(5rc aro alpo forms with terrestrial larvce, such as tho Psocidie (very small insects which live like plant-llco fthiefly on hardwood tr(;(;s, and often attmct attention by the woolly-looking niasuea which they form). Allied to these are the tropical Termites, often called "white ants," because they live a social life in colonies and build nests. An African speciesâTermas hellicoHuaâbuilds towers 12 or 15 feet high ; in atldifcion to the nuiler and females, the inhabitants are partly wingless neuters, most of wliich undertake the work, but 3omo the defence of the colony, and are therefore called workers and soldiers. Occupying an intermediate place between the Orthoptera ana the next order, is the family Tlirypsidte, including minute insects which have tho parts of tho mouth adapted for sucking vegetable juices. They often attack cultivated plants in great numbers, causing destruction, ;., of the hay and onion crops. The wings of the adults aro margined by long delicate hairs. 30. Like the Orthoptera, the Hemiptera are insects with an in- complete metamorphosis, but the parts of the mouth are gener- ally modified for sucking, the labium being conveited into a grooved and jointed proboscis (generally folded back underneath the thorax), in which ihe mandibles and the maxillae lie in tho form of slender stylets (Fig. 146, 2).. Fig-. 146,1, ?, ^âPiagrmm of transectJons of the â proboscta of dipterous, hemip. terous. and lepidopteroua iusecta.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
