60 DIPTERA OF NORTH AMERICA. [PART IV. 



sufficient importance to justify a generic separation of those few 

 species which possess them, the genus Glochina will have to be 

 abandoned. By all means Glochina cannot be maintained as a 

 name of the group now called Dicranomyia. This name, as 

 shown above, has been proposed a year earlier, and was, from 

 the beginning connected with a series of those very species which 

 constitute it now. 



Table for the determination of the species. 

 Wings remarkably narrow, lanceolate (Tab. I, fig. 1). 



1 longipennis Schum. 



1 V/ings of the usual shape. 2 



f Tip of the auxiliary vein nearly opposite, or before, or only a short 



2 J distance beyond the origin of the second longitudinal vein. 3 



I Tip of the auxiliary vein a considerable distance beyond the origin 



[ of the second longitudinal vein. 16 



o ( The whole antennae, or at least their basal joints, pale. 4 



I The whole antennse black or brown. 7 



a( Discal cell open. 5 



( Discal cell closed. 6 



- ( Thorax with a single brown stripe in the middle. 2 immodesta 0. S. 



{ Thorax with three brown stripes. 3 gladiator 0. S. 



g ( Flagellum of the antennse and halteres infuscated. 4 diversa 0. S. 



I Flagellum and halteres not infuscated. 5 pudica 0. S. 



'Discal cell (in normal specimens) open; tip of the auxiliary vein 



considerably anterior to the origin of the second vein ; the prse- 



furca is about equal in length to the distance between the origin 



of the third vein and the small cross-vein, or even shorter. 8 



Discal cell closed ; tip of the auxiliary vein nearly opposite the origin 



of the second vein (or, when anterior or posterior, the distance 



small) ; prgefurca distinctly longer than the distance between the 



origin of the third vein and the small cross-vein. 10 



8 ( Rostrum and proboscis nearly as long as the head. 6 rostrifera, n. sp. 



( Rostrum and proboscis much shorter than the head. 9 



o ( Thorax ochraceous. 7 brevivena, n. sp. 



1 Thorax brown. 8 floridana, n. sp. 



/ Thorax shining black, pleurse with a silvery reflection. 



10 S 15 morioides 0. S. 



' Thorax brownish or grayish. 11 



, .. ( Femora with a rather broad pale band at the tip. 14 badia Walk. 



\ Femora without such a band. 12 



r The distance between the tip of the auxiliary vein and the subcostal 



-r, J cross-vein is nearly as long as the stigma. 13 



i The distance between the tip of the auxiliary vein and the subcostal 



*■ cross-vein is shorter than half the length of the stigma, 14 



7 J 



