DIpTERA O^ MINNESOTA. 33 



The Anomalous Neniatocera. The antennae are composed of many seg- 

 ments, but are shorter than the thorax, and without whorls of long 

 hairs. The segments of the antennae are short and broad, and 

 closely pressed together. Except in the first family the abdomen is 

 comparatively stout, and the legs are shorter and stouter than in the 

 True Neniatocera. 



The False Crane-flies, Family RhyphidaE, p. 67. 



The Solitary Midge, Family OrphnEphilidaE, p. 67. 



The March-flies, Family Bibionidae, p. 68. 



The Black-flies, Family SimulidaE, p. 70. 

 The Short-Horned Orihorrhapha or Brachycera. Orthorrhapha with one or 

 two-jointed, porrect palpi, and with usually short, three-jointed 

 antennae. The third segment of the antenna is sometimes distinctly 

 ringed, showing that it is really composed of many segments grown 

 together; and sometimes the antennae are four or five-jointed. 

 The Anomalous Brachycera. The third segment of the antennae is ringed, 

 showing that it is composed of several segments grown together. 

 The body is not furnished with strong bristles. 



The Horse-flies, Family TabanidaE, p. 76. 



The Soldier-flies, Family StratiomyidaE, p. 80. 



The Acanthomerids, Family Acanthomeridae, p. 82. 



The Snipe-flies (in part), Family LeptidaE (Xylophagidae and Cocno- 

 myidae), p. 83. 

 The True Brachycera. The antennae are usually three-jointed, but some- 

 times four or five-jointed. The third segment is not ringed, but 

 usually bears a style or bristle. The body is usually furnished with 

 strong bristles. 

 True Brachycera zvith the empodia pulvilliform. Flies in which there are 

 three membranous lobes beneath the tarsal claws (Fig. 10). 



The Snipe-flies (in part), Family LeptidaE, p. 83. 

 . The Small-headed Flies, Family AcroceridaE, or Cyrtidae, p. 85. 



The Tangle-veined Flies, Family NemistrinidaE, p. 86. 

 True Brachycera zvith the empodia not pulvillifo'rm. Flies in which there are 

 only two membranous pads beneath the tarsal claws. 



Vein III of the wings four-branched. 

 The Robber-flies, Family Asilidae, p. 86. 

 The Midas-flies, Family Midaidae, p. 88. 

 The Apiocerids, Family Apioceridae, p. 88. 

 The Bee-flies, Family Bombylidae, p. 89. 

 The Stiletto-flies, Family ThEREvidaE, p. 91. 

 The Window-flies, Family ScenopinidaE, p. 92. 

 The Dance-flies (in part), Family EmpididaE, p. 93. 



Vein III of the wings three-branched. 

 The Dance-flies (in part. Family EmpididaE, p. 93. 

 The Long-legged Flies, Family Dolichopodidea, p. 94. 

 The Spear-winged Flies, Family Lonchopteridae, p. 98. 



