416 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Genus TEUCHOLABIS Osten Sacken. 



KF.Y TO SPECIES. 



1. Wing over 6 mm. ; wings broad ; Sc long, ending beyond two-thirds the length 

 of the sector ; r inserted on fl^+s ; vein 1^2+3 not upturned at its tip, the end 

 of cell second R i being much broader than the end of cell R 3 ; praescutum 



reddish, with three blacli stripes T. complexa (p. 416). 



Smaller, wing under 5 mm. ; wings narrow ; Sc short, ending before mid- 

 length of the sector ; r inserted at or near the end of Rs; vein R2H upturned 

 at the tip, the end of cell R 3 being broader than the end of cell second R 1 ; 

 praescutum shiny black, only the humeral parts of the sclerite light 

 yellow T. lucida (p. 410). 



The immature stages, as known, are spent beneath the bark of 

 trees. 



* TEUCHOLABIS COMPLEXA Osten Sacken. 



Frequent in Piedmont localities ; ^lay 30 to August 28. P. I. 



♦TEUCHOLABIS LUCIDA Alexander. 



Plate 23, fig. 5. 



Dalecarlia Reservoir, District of Columbia, August 22, 1915, 

 McAtee. 



Tribe ERIOPTEEINI, 



KHl" TO GENERA. 



1. Three branches of media reaching the wing margin Cladura (p. 417). 



Two branches of media reaching the wing margin 2. 



2. Rs shorter than i?2+3 3. 



7?2 longer than R2+3 I" 4. 



3. Cross vein r present ; tubercnlate pits retreated bacliward to near midlength 



of the praescutum Erioptera (subgenus Empeda) (p. 417). 



Cross vein r lacking; tuberculate pits located on the anterior part of the 

 praescutum Gonomyia (p. 420). 



4. Rs ending in cell R2 Molophilus (p. 419). 



Rs ending in cell Rs 5. 



5. A supernumerary cross vein in cell R2; second Anal vein strongly bisinu- 



ate HeloMa (p. 420). 



No supernumerai-y cross vein in cell R 2 ; second Anal vein not bisinuate 6. 



6. Cui tending to turn toward the wing apex ; forks of the longitudinal veins 



very long and deep Erioptera (p. 417). 



Cm straight or tending to turn away from the wing apex 7. 



7. Sc2 not far removed from the tip of Sci ; coloration of local species deep 



black Gnophomyia (p. 422) . 



Sc2 retreated toward the base of the wing so that Sri is usually more than 



two-thirds the length of the sector 8. 



S. AVings glabrous ; last three segments of the antennae abruptly smaller than 



the others Triinicra (p. 422). 



Wings pubescent ; antennal segments gradually lessening in size toward the 

 tip of the organ Ormosia (p. 422). 



