list of diptera. 267 



2. Dasybasis fusconiger. 

 Silvius? fusconiger, Cat. of Diptera, Pt. 1, 192. 



3. Dasybasis person at us. 

 Silvius ? personalis, Cat. of Diptera, Pt. 1, 192. 



4. Dasybasis eristaloides. 

 Silvius? eristaloides, Cat. of Diptera, Pt. 1, 193. 



Genus 8. ACANTHOCERA. 



Proboscis brevis. Ocelli nulli. Antenna? 7-articulatae, capitis 

 tboracisque longitudine ; flagellum simplex, fusiforme, basi elonga- 

 tum ; articuli lus et 2us acuminati. Alae angustae ; venae cubitalis 

 ramus lus iurcatus. 



Acanthocera, Macq. Hist. Nat. Dipt. i. 



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

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

 slightly curved towards its tip, ending much nearer to the tip of the 

 wing than to the subcostal. First branch of the cubital simple, ob- 

 tusely angular near the base, almost straight from thence to the 

 tip ; 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 close to the border. Discal areolet 

 elongated, narrow, hexagonal. 



1. Acanthocera longicornis. 



Nigra, gracilis, orichalceo lineata ; al& costa, lunula, vittaque 

 fuscis. 



Tabanus longicornis, Fair. Eat. Syst. iv. 371, 38; Syst. Antl. 



103,45. 

 Haematopota triangularis, Wied. Zool. Mag. iii. 44, 6. 

 Haematopota longicornis, Wied. Dipt. Exot. i. 98, 4 ; Auss. Zweifl. 



i. 213, 1. 

 Acanthocera longicornis, Macq. Dipt. Exot. i. 1, 154. 



Brazil. 



2a2 



