242 ECONOMIC ENTOMOLOGY 



EE. Discal and second basal cells separated; anal cell 

 complete. 

 F. Oral vibrissa present. 



G. Arista long plumose or pectinate above. — 

 DrosophilidcE (Pomace Flies), p. 260. 

 GG. Arista bare, pubescent or short plumose; 

 front bristly as far as middle, usually light 

 colored. — Agromyzidce (Leaf-miner Flies), p. 

 262. 

 FF. Oral vibrissae absent. 



G. Subcostal vein abruptly bent forward before 

 the tip of Radius I; anal cell angular. Wings 

 pictured. — Trypetida (Fruit Flies), p. 264. 

 GG. Subcostal vein more or less fused with Radius 

 I; all three basal cells distinct, anal cell not 

 produced; antennae more or less elongate and 

 decumbent. — Psilidce (Rust Flies), p. 262. 

 CC. Alulets or calypters large; eyes of males often contiguous; thorax 

 with complete transverse suture. — Calyptrate Muscids. 

 D. Cell Radius 5 closed or more or less narrowed at the margin 

 of the wing. 



E. Antennal bristle bare. — Tachinidce (Tachina-flies), p. 278. 

 EE. Antennal bristle bare near tip. — Sarcophagida (Flesh- 

 flies). 

 EEE. Antennal bristle pubescent or plumose to the tip. 



F. Dorsum of abdomen bristly; legs elongate. — 

 Dexiidce. 

 FF. Dorsum of abdomen not bristly except at tip. — 

 Muscida (House-flies), p. 268. 

 DD. Cell Radius 5 widely open. — Anlhomyiida (Root-maggot flies), 



P- 273- 

 AA. Adults parasitic; upper lip enveloped by maxillae as by a sheath. — Piipipara 

 (Sheep-ticks, etc.), p. 279. 

 (Consult Tech. Series, No. 22, Bur. Ent., U. S. Dep. Ag. on "The Structure 

 of Certain Dipterous Larvae, etc., " by N. Banks, 19 12) 



TIPULIDiE (CRANE FLIES) 



Meadow Maggots {Crane Flies or Leather Jackets). Adult. — Large 

 mosquito-like flies with very long thin legs, long slender bodies, 

 narrow wings and thread-like antennas. A transverse V-shaped suture 

 on the back of middle portion of the thorax (Figs. 145 and 153). 



Larva. — When full grown about an inch long, dirty brown, and 

 footless; of a tough leathery texture; cylindrical; tapering in front and 

 blunt behind. 



