INDEX. 



This index includes all the generic and specific names treated in this paper. 

 Generic names are in bold face type, valid specific names in roman and 

 synonyms in italics. 



Page. 



abbreviatus Loew (Bibio) 8 



aestiva Melander (Bibiodes) — 5 



albipennis Say (Bibio) 8 



articulatus Say (Bibio) 16 



baltiujoricus Macquart (Bibio)- 17 



basalis Loew (Bibio) 9 



Bibio Geoffroy 6 



Bibiodes Coquillett 5 



bicolor Bellardi (Plecia) 3 



biraaculata Walker (Plecia) 5 



breviceps Loew (Dilophus) 19 



brevicornis Walker (Hes- 



perinus) 3 



brunnipes Fabricius (Bibio) 17 



canadensis Macquart (Bibio) __ 17 



castanipes Jaennicke (Bibio) 17 



caurinus, new species ( D 11 o - 



phus) 19 



confusa Loew (Plecia) 4 



criorhinus Bellardi (Bibio) 9 



Biloplms Meigen 18 



dimidiatus Loew (Dilophus) 23 



emarginatus, new species (Dilo- 

 phus) 20 



femorata Melauder ( Bibiodes )_ 5 



femoratus Wiedemann (Bibio) _ 10 



fraternus Loew (Bibio) 10 



fulvicoxa Walker (Dilophus) __ 25 



fumidus Coquillett (Bibio) 12 



fumipennis Walker (Bibio) 11 



fuscipennis Macquart (Bibio)— 10 



gracilis Walker (Bibio) 14 



halteralis Coquillett (Bibiodes). 6 



Hesperinus Walker 3 



heteroptera Say (Plecia) 4 



hirtus Loew (Bibio) 9 



holtii, new species (Bibio) 11 



humeralis Walker (Bibio) 11 



Inaoqualis Loew (Bibio) 12 



longiceps Loew (Dilophus) 25 



longipes Loew (Bibio) 12 



Page. 



longii>es Loew (Plecia) 5 



lugens Loew (Bibio) 17 



nervosus Loew (Bibio) 13 



nigripilus Loew (Bibio) 17 



obesulus Loew (Dilophus) 20 



obscurus Loew (Bibio) 17 



occipitalis Coquillett ( D i 1 o - 



phus) 26 



orbatus Osten Sackeu (Dilo- 

 phus) 21 



orbatus Say (Bibio) 17 



palliatus, new subspecies 



(Bibio) 16 



pallipes Say (Bibio) ^ 17 



Plecia Wiedemann 3 



proximus, new species (Dilo- 

 phus) 22 



pusillus Wiedemann ( D i 1 o - 



phus) 26 



ruflcolUs Fabricius (Plecia) 4 



rufipes Fabricius (Bibio) 17 



rufithorax Wiedemann (Bibio)- 13 



scita Walker (Bibio) 17 



sectus, new species (Dilophus)- 22 



senilis Wulp (Bibio) 17 



serotinus Loew (Dilophus) 23 



serraticollis Walker (Dilophus)- 26 



slossonae Cockerell (Bibio) 14 



spinipes Say (Dilophus) 23 



stigmaterus Say (Dilophus) 24 



striatipes Walker (Bibio) 17 



strigilatus, new species (Dilo- 

 phus) 24 



tenuipes Coquillett (Bibio) 14 



tlioracica Say (Bibio) 18 



tlwracicus Say (Dilophus) 23 



tibialis Loew (Dilophus) 25 



tristis Williston (Bibio) 14 



variabilis Loew (Bibio) 15 



vestitus Walker (Bibio) 15 



xanthopus Wiedemann (Bibio)- 16 

 27 



