LIST OF DIPTERA. 423 



Group 5. 

 Enarmostus, Walk. Diptera Saundeniana, Pt. 2, 102. 



88. Dasypogon bimacula. 



Enarmostus bimacula, Diptera Saundersiana, Pt. 2, 102, pi. 4, f. 1. 

 North America. 



Group 6. 



3Ias. Mystax spinis plurimis nigris armatus. Antennarum 

 articulus 3us sublinearis, lo et 2o conjunctim fere triplo longior. 

 Abdomen lateribus basi setosis, dimidio basali lineari, apicali sub- 

 fusiformi. Pedes spinosi. 



89. Dasypogon tristis. 



Dasypogon tristis, Diptera Saundersiana, Pt. 2, 93. 

 United Slates. 



Group 7. 



Corpus mediocre aut parvum, nigrum, pilosum. Caput thorace 

 vix angustius. Facies valde convexa. Mystax densissime hirtus, 

 faciem omnem occupans. Antennae longje ; articulus lus 2o 

 longior; 3us sublinearis, arista longiuscula, arliculis lo et2o con- 

 junctim pauUo longior. Pedes validi. 



Forks of the cubital vein nearly straight, their base a little 

 nearer thau the end of the discal areolet to the tip of the wing. 

 First and second externo-medial veins proceeding straight to the 

 border ; third inclined to the fourth, but rather remote from it on the 

 border. Subanal near the anal on the border. Discal areolet 

 hexagonal, rather long. 



