Vol. XXvii] ENTOMOLOGICAL NEWS. 149 



facial bristles directed laterally, i. c, in opposition to the regu- 

 lar converging series. The cheeks are rather narrow and the 

 parafacials are not noticeably setulose above; the dorsum of 

 thorax and abdomen cinereous or but faintly brownish. 



Discocerina argyrostoma n. sp. 



Black ; apex of proboscis, bases of tarsi, tawny ; halteres yellowish- 

 white. Wings clear hyaline. 



Shining ; front opake brownish, orbits whitish below ; face opake 

 silvery or grayish white ; antennae white or gray pruinose. 



Frons longer than broad, with orbits parallel ; one orbital bristle. 

 Face as broad as frons, flat, slightly retreating below, with two bristles 

 below middle; foveae weak or absent. Mesonotal setulae erect; pre- 

 scutellar bristles near margin. Scutellum convex, triangular. Ab- 

 domen ovate, apex acute ; segments subequal ; hypopygium incon- 

 spicuous. Length 4.5 mm. 



Type. — $, Berkeley Hills, Alameda County, California, 

 April II, 1908, (E. T. Cresson, Jr.), [A. N. S. P. No. 6102]. 



Furatypes. — i 5,3$, topotypical. 



This is not a typical Discocerina. The face is flat and broad, 

 with no, or very weak, foveae. The shining black thorax and 

 the liat, silvery white face will separate this species from all 

 the others of the genus. 



Mosillus tibialis n. sp. 



Black; third antennal joint sometimes, tibiae except middle of hind 

 ones, a.id tarsi except apices, tawny ; halteres whitish ; wings hyaline, 

 lacteous, veins yellow. 



Polished, with faint metallic reflections; parafacials (but not the 

 cheekii;, ioveae, middle of face except prominence and lateral papil- 

 lae, all outer surfaces of tibiae, silvery; third antennal joint and meso- 

 notum somewhat faintly gray. Frontal triangle, mesonotum and scu- 

 tellum subopake, minutely punctured. 



In other respects similar to M. suhsultans Fab. 



Type. — $, Wildwood, New Jersey, July 18, 1908, (E. T. 

 Cresson, Jr.), [A. N. S. P. No. 6103]. 



Paratypes. — 19 5,59, topotypical. 



This name is proposed for the American species. It is 

 possible that Walker may have described it. Our species dif- 

 fers from the European suhsultans in having the tibiae tawny, 

 not black, and in general it is more distinctly sculptured espe- 



