Vol. XI] CURRAN— REVISION OF THE PIPIZA GROUP 379 



on the middle; face and eyes with white hairs; frons chiefly black haired about 

 the vertex and base of the antennae, whitish between. Legs black, knees, 

 base of the tibiae broadly, and the tip narrowly, and tarsi, reddish yellow; 

 last three joints of all tarsi browned, hind basitarsi quite yellowish and rather 

 dilated. Pubescence of the thorax, abdomen, pleurae and femora almost all 

 whitish. Length 9 mm. 



"An examination of several European specimens causes me to add: Male: 

 Abdomen with a pair of transverse oblong yellowish or reddish yellow spots 

 on the second and third segments; frons more shining; third joint of the an- 

 tennae short and stumpy, dark brown above but reddish brown beneath [this 

 may refer to an individual specimen]; arista short but longer than the antennae 

 and thickened for about two-thirds its length. Abdomen with a little pale 

 pubescence on and about the pale spots and about the end of the fourth 

 segment. 



"Female: More shining. Abdomen with very little black pubescence. 

 Dust spots on sides of the front hardly visible." (Verrall). 



This species has been recorded from some of the 

 States and I have a female from Ontario. I give Ver- 

 rall's description almost word for word although it is 

 not a systematic one. No doubt can exist in the de- 

 termination of typical specimens but the second pair 

 of spots are often obsolete or nearly so. In such cases, 

 the females may be easily confused with nigripilosa; 

 but the males will be recognized by the slender hind 

 femora and the yellow spots on the second segment. 



43. Pipiza tricolor, new species 

 Habitat: Ontario! Yellowish white pilose; face en- 

 tirely black pilose; hind femora with inconspicuous 

 spines behind; wings slightly brownish in front, the 

 basal quarter of the sub-marginal cell purely hyaline. 



Male: Length, 7.5 mm. Face and frons shining black, thinly covered with 

 white pollen; face receding, but less so on lower half, black pilose; frons black 

 pilose, above with dilutely yellowish pile. Antennae black, third joint brown, 

 sub-cordate; arista brown, its base luteous; vertical triangle black pilose in 

 front, yellow behind; eyes with luteous pile, lighter below; occipital cilia black 

 except at the vertex, where there are a few yellowish hairs; pile of posterior 

 orbits whitish below, black in middle, yellowish above. Thorax and scutellum 

 shining bluish black, with luteous pile; an area of black pile crosses the front 

 of the thorax and the pleurae above and connects with the black of the humeri; 

 tip of scutellum with cinereous pile. Abdomen shining black with the usual 

 areas sub-opaque; yellowish and yellowish white pilose, with the usual areas 

 and the hypopygium black pilose. Legs black; tips of all the femora, broad 

 base and tips of tibiae, and the first three joints of tarsi, piceous yellow. Wings 

 tinged with brownish in front, basal quarter of sub-marginal cell hyaline; 

 stigma luteous. 



Holotype, male, No. 874, Mus. Calif. Acad. Sci., 

 June 15, 1919, H. Curran collector. Paratype, male, 

 Orillia, Ont., May 4, 1914 (Curran) in author's collec- 

 tion. 



Type locality, Jordan, Ontario. 



