THE CANADIAN ENTOMOLOGIST. 239 



hind legs in the middle broadly brownish. All of the tarsi golden, wings 

 whitish, 



(Trans, from original description.) 



An examination of the specimens in the U. S. N. M. collections 

 discloses considerable variation in the character of the thoracic viUse in 

 this species. They are in some specimens very strong and well marked, 

 at times continued to the disc of the scutellum, in others so faint as to be 

 discernible only after careful examination. The spots upon the second 

 abdominal segment also vary considerably in size. 



Leucopis simplex Loew. 



Loew, Cent., VIII, No. 96, 1869. 



$. — Length of body, ^ lin.; of wing, 5/6 lin. Blackish, entirely 

 covered with thickly-dusted whitish pollen, the antennae and palpi black, 

 legs blackish, base and apex of the tibiae and the first four tarsal joints 

 yellowish. 



Colour of body black, uniformly concealed by white pollen, abdomen 

 immaculate. Antennae and palpi black in colour. Femora black, tibise 

 blackish-fuscous, in the base broadly, in the apex less broadly yellowish, 

 tarsi yellowish, but with the last joint only blackish-fuscous. Halteres 

 whitish, wings hyaline, veins fuscous. 



(Trans, from original description and compared with type.) 



The colour of the legs in the specimens in the U. S. N. M. collections 

 appears to vary somewhat, as some of the specimens have the base and 

 apex only, and others the greater part of the femora yellowish. Many of 

 the specimens, which otherwise agree with Loew's description, have the 

 wings whitish dusted. One specimen which I found in the series, from 

 Flagstaff, Arizona (H. S. Barber coll.), has the thorax immaculate, but 

 there are two small black spots on the second abdominal segment ; another 

 from Sea Isle City, N. J., has the thorax immaculate, the abdomen with the 

 characteristic markings of Z. bella, the second abdominal segment bearing 

 two lateral blackish spots, and a basal median vittula, the third and fourth 

 with the basal median vittula only. 



Leucopis bella Loew. 



Loew, Cent. VI, No. 99 (1865). 



?. — Length of body, 11/12 to i line; of wing, 11/ 12 line. Whitish, 

 thorax with two fuscous vittse, first abdominal segment, except the margins, 

 black, following segments each with a single minute median basal black 

 spot, the second segment also bearing a black spot on each side. 



