THE CANADIAN ENTOMOLOGIST. 1G5 



triangle enclosed in the bifurcation of this stripe ; the remaining portion 

 of the vertex blackish ; the rows of frontal bristles, on both sides of the 

 frontal stripe, are short and inconspicuous superiorly, and only of moderate 

 length near the antennse. Of the three uppermost pairs of long bristles 

 pointing backwards, which exist on the vertex in E. fi/ti/is, only the 

 upper one is present ; the lowest bristle of the rows is nearly opposite the 

 end of the second antennal joint; there are but a few very inconspicuous 

 hairs on the lower part of the front, between these rows and the orbit ; 

 nearer to the vertex, these hairs become more dense ; a bristle above the 

 upper corner of the eye (corresponding to a similar bristle in E. futilis % ,) 

 is present ; the pair of bristles pointing forward on the ocellar triangle is 

 also extant. Below the bristles the face is smooth, with but a few almost 

 microscopic hairs : a short distance from the oral margin, there is on each 

 side, the usual long bristle, above it some shorter hairs do not reach very 

 high on the face. Antennae black somewhat reddish on the incisure be- 

 tween the second and third joints ; third joint with parallel sides, much 

 shorter than the corresponding joint of E. futilis and not reaching the 

 edge of the mouth by about one half of its own length. Eyes distinctly 

 pubescent ; palpi yellowish. 



Thorax black, with the usual five stripes of gray pollen on the dorsum ; 

 scutellum with a brownish tinge, grayish-pollinose ; bristles placed as in 

 E. fictilis. Abdomen blackish in the middle, reddish on the sides and at 

 the tip ; the red on the second and third segments occupying as much of 

 the breadth of the dorsum as the black ; the fourth segment is red, with 

 elongated blackish spot in the middle of its base ; all the segments with 

 silvery-gray reflections. A row of bristles along the posterior margin of 

 the third and on the fourth segments ; the pairs of longer bristles on the 

 first and second segments, which exist in E. futilis, are wanting here. 

 Venter red, densly clothed with black hairs. Venation of the wings as in 

 E. futilis ; but the costal vein is not prolonged beyond the tip of the 

 fourth vein ; the great cross vein is distinctly bisinuate. 



Bred from Dcilcphila lineata (C. V. Riley), 



Three specimens. 



The presence of only a single pair of long bristles on the top of the 

 vertex, pointing backwards, and the absence of the pairs of macrochet^ 

 on the first and second abdominal segments, prove that this species belongs, 

 if not to a different genus, at least to a different section of a genus than 

 E. futilis. 



