Insects : their life-histories and habits . not in Europe;the Acrcvuxr occur in tropical America, Africa, Indiaand Australia; while the HcUconiince and Ithomwice areconfined to Tropical America. Order XVII.—Diptera. The true flies, which constitute this order, may bedistinguished from all other winged insects by the reduc-tion of the hind-wings to stalked knobs called balancersor halteres, the fore-wings alone being used for some families there is a membranous hood, calledthe squama, behind each wing. The mouth-parts aremodified for piercing and sucking (page 45). The antennasvary gr
Insects : their life-histories and habits . not in Europe;the Acrcvuxr occur in tropical America, Africa, Indiaand Australia; while the HcUconiince and Ithomwice areconfined to Tropical America. Order XVII.—Diptera. The true flies, which constitute this order, may bedistinguished from all other winged insects by the reduc-tion of the hind-wings to stalked knobs called balancersor halteres, the fore-wings alone being used for some families there is a membranous hood, calledthe squama, behind each wing. The mouth-parts aremodified for piercing and sucking (page 45). The antennasvary greatly in different families, but are rarely con-spicuous. The legs are usually slender, often spiny, whilethe tarsi have five segments. The wings are membranouswith not more than seven longitudinal nervines, and afew cross nervules. Diptera undergo a very completemetamorphosis, the larva being always eruciform, oftena legless maggot. The pupa is variable in form. It israrely enclosed in a cocoon, but lies buried in the ground, ll ATK XV. Groat Ox Gad-fly [Tabanua bovinus):magnifiei 1 Crane-fly or Daddy-Long][Tipula oh raci a)
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1913
