OTwo different venational terminologies ●Comstock-Needham Older system in which the principal longitudinal veins are numbered. wings
Two different venational terminologies ⚫Comstock-Needham ⚫Older system in which the principal longitudinal veins are numbered. wings
o Venation of Diptera R:+Ri R+Rs 盘室 用 M:+M 腋裙 餐室 得叶 Mi+M 基室C1十1A 图23-119 双翅目昆虫（蝇类）的前翅
Venation of Diptera
o One or two lobes at the base of the wing, on the posterior side o Folded back over the abdomen o These lobes are the catores o The halteres are small,club-like structures that function as balancing organs during flight
One or two lobes at the base of the wing, on the posterior side Folded back over the abdomen These lobes are the calypteres The halteres are small, club-like structures that function as balancing organs during flight
legs足 o The pulvilli are pads at the apex of the last tarsal segment,one at the base of each claw. The presence or absence ofsu. Spinelike structures,usually located at the distal end of the tibia
legs足 The pulvilli are pads at the apex of the last tarsal segment, one at the base of each claw. The presence or absence of tibial spurs. ⚫ Spinelike structures, usually located at the distal end of the tibia
o Structure of the empodium ●A structure arising from between the scopy.Ine. claws on the last tarsal segment It is bristlelike or absent in most flies ●It is large and membranous and resembles the ouli in appearance Copyright2004 Dennis Kunkel Microscopy,Inc
Structure of the empodium ⚫ A structure arising from between the claws on the last tarsal segment ⚫ It is bristlelike or absent in most flies ⚫ It is large and membranous and resembles the pulvilli in appearance