658 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



bristles at beyond middle, postero-ventral surface bare. Wings clear, 

 third and fourth veins slightly convergent at apices, outer cross vein 

 bent, at less than its own length from end of fifth and at one-fourth 

 from small cross veui to apex of fourth ; costal thorn absent. Calyptrge 

 white, the under scale much the larger. Haiteres yellow, base of 

 stalk darkened. 



Length. — 4-4^ mm. 



Ty pe-Csit. No. 15310, U.S.N.M. 



Three males, Bonhill, Dumbartonshire, Scotland, June 29, 1907, 

 and August 8 and 29, 1908 (J. R. Malloch). 



This genus is closely allied to Fannia Robineau-Desvoidy, but may 

 be easily separated by the wider frons, different frontal bristling, and 

 unmarked abdomen, as well as several minor characters given in 

 description. The species bears a remarkable resemblance to the 

 females of certain species of Fannia. 



Named in honor of Hen P. Stein, whose work on this group in 

 Europe has laid the foundation of practically all that has been done 

 in systematic work on it in recent years. 



EXPLANATION OF PLATE 46. 



Fig. 1. Wing of Limosina piduratus, male. 



2. Hypopygium of Pipunculus winneviannae , male. 



3. Antenna of Pipunculus winnemannse, male. 



4. Ovipositor of Pipunculus vierecH, female. 



5. Antenna of Pipunculus vierecki, female. 



6. Face of Simulium hicoloratum, female. 



7. Thorax of Simulium hicoloratum, female. 



8. Claw of Simulium bipunctatum, female. 



9. Claw of Simulium townsendi, female. 



