154 LIST OF DIPTERA. 



27. DlCHELACERA ALCICORNIS. 



Albida ; antennce dente elongate* ; thorax vittis tribus postice con- 

 Jluentibus ; abdomen Jlavidum, fusco faseiatum ; alee semi- 

 fasciatce. 



Tabanus alcicornis, Wied. 

 Brazil. 



28. DlCHELACERA UNIFASC1ATA. 



Fcem. Antennce ferruginece ; thorax albicans ; abdomen flavicans, 

 fasciis fuscis; femora flava, tibice fuscce ; alee margine ex- 

 terna fasciaque obliqua fuscis. 



Dichelacera unifasciata, Macq. Dipt. Exot. i. 1, 115, 3. 

 Brazil. 



Africa. 



29. DlCHELACERA BINOTATA. 



Mas et Fcem. Rufa; abdominis segmentum 2um maculis duabus 

 rufis ; alee basi fascia transversa maculaque postica fuscis. 



Dichelacera binotata, Macq. Dipt. Exot. i. 1, 113, 1. 

 Cape. 



Genus 6. TABANUS. 



Corpus magnum aut maximum, oblongum, saepissime nigrum, 

 tomento et pilis pallidioribus. Ocelli nulli. Palpi maris capitati, 

 foeminae subulati. Antennas 7-articulatae, subretusae ; articulus lus 

 cylindricus, subclavatus, apice truncatus; 2us cyathiformis ; 3us 

 compressus, supra excisus. Alae divaricatae ; areola analis retracta. 



Tabanus, Fall. Dipt. Suec; Meig. ; Macq. ; Zett. ; Curt. ; Westw.; 



Zeller. 

 Tabanus, p., Linn.; Fabr.; Latr. ; Wied. 



Costal vein ending at the tip of the wing. Mediastinal ending 

 before two-thirds of the length. Badial ending at a little before 



