118 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



A CONTRIBUTION TO NORTH AMERICAN DIPTEROLOGY. 



BY HARRISON E. SMITH, 

 U, S. Bureau of Entomology , Melrose Highlands, Mass. 



In the following paper are included the descriptions of 

 several new species of North American Tachinidae and Syrphi- 

 dse; also a summary of the North American representatives 

 of the genus Hyperecteina Schiner. I am under obligations 

 to Mr. Frederick Knab and Mr. C. W. Johnson, each of whom 

 very kindly offered much valuable advice and criticism; also 

 to Dr. L. O. Howard, who made possible my opportunity to 

 examine many of the types for comparison. 



FAMILY SYRPHID^. 

 Helophilus willingii, new species. 



Eyes and arista bare; third antennal joint oval; head, thorax, abdomen 

 and legs shining black in ground color. Length 11 to 12 mm. 



Male and Female. Front in the male about one-half as wide as, in the 

 female nearly as wide as either eye; in the male pile on the upper half 

 of the front black, on the lower half grayish white; in the female black pile 

 on the front, descending a little below the upper half; vertex shining 

 black, very thinly dusted gray pollinose; face on the lower half produced 

 obtusely downward and forward into a cone, shining black, densely grayish- 

 white pollinose on the sides and bearing pile of a similar color along the 

 margins of the eyes; beneath the antennae concave for a short distance 

 and then nearly straight to the tip; in the middle of the face extending 

 from the tip of the epistoma nearly to the base of the antennas a moderately 

 broad shining black stripe; epistoma on the ventrad shining black; cheeks 

 below the eyes narrow, dull black, grayish pilose; first two joints of antennae 

 shining black; the third joint brownish black, dusted gray pollinose; 

 shining brownish black just above the base of the antennae; arista brown; 

 thorax shining black, the usual lateral stripes rather indistinct gray; 

 in the female two velvety black spots at the tip of each mesothoracic 

 suture; pile of mesonotum grayish; scutellum shining black, gray pilose; 

 pleurae also shining black and densely grayish pilose; abdomen oval, 

 shorter than the wings, wholly shining black, sparsely grayish pilose, 

 except the dorsad of segment 3 and the basal margin of segment 4, which 

 are mostly covered with very short black pile; legs shining black, the tip 

 of femora and the base of tibiae faintly brownish; pile in most reflections 

 grayish and black; on the tarsi ochraceous in some reflections; pulvilli 

 and the tarsal claws on the basal two-thirds yellowish; tips of the tarsal 

 claws black; wings in the male subhyaline; in the female slightly smoky 

 tinged; the veins and stigma brownish; sixth longitudinal vein gently 

 curved; calypteres whitish. 



