272 LIST OF DIPTERA. 



Genus 10. HADRUS. 



Corpus squamosum. Frons foem. lata. Facies convexa. 

 Ocelli nulli. Palpi foem. ovati, obtusi. Proboscis brevis. An- 

 tennae mediocres, iucumbentes, 7-articulatae, oculis inferius insertae* 

 articulo 3o simplici. Tibiae anticae arcuatae. 



Hadrus, Perty, Del. Anim. Artie. Bras. 

 Tabanus, p., Wied. 

 Lepiselaga, Macq. 



Mediastinal vein ending at two-thirds of the length of the 

 wing. Subcostal ending at three-fourths of the length. Radial 

 ending at nearer to the subcostal than to the tip of the wing. First 

 branch of the cubital simple, slightly curved, forming an obtuse and 

 rounded angle near the base ; second branch straight, ending on the 

 hind border far from the tip of the wing. Four complete separate 

 externo-medial veins. Subanal vein united to the anal near the 

 border. Discal areolet elongated, narrow, hexagonal; hind side 

 very concave. 



1. Hadrus lepidotds. 



Niger, viridaureo squamulosus; alee nigrce, guttulis albis, apice 

 limpidce. 

 Tabanus lepidotus, Wied. 

 Brazil, Guiana. 

 a. Para. From Mr. Bates' collection. 



Genus 11. SELASOMA. 



Foem. Corpus compressum, metallicum. Caput depressum, 

 Frons sat angusta. Facies brevis. Oculi nudi. Ocelli nulli. 

 Palpi crassi, subelevati, supra convexi. Antennae capitis basi in- 

 sertae, articulo 3o latissimo compresso ovali. Tibiae latae, convexa?, 

 extus ciliatae. Alarum vena cubitalis ramo lo furcato. 



Selasoma, Macq. Dipt. Exot. 

 Tabanus, p,, Wied. 

 Hadrus, p., Walk. 



Mediastinal vein ending before two-thirds of the length of the 

 wing. Subcostal ending at three-fourths of the length. Radial 

 ending a little nearer to the tip of the wing than to the subcostal. 



