92 S. W. Williston — North American Conopidoe. 



nearly equal distance above and below, and narrowed in the middle 

 of the profile to about one half. Face nearly perpendicular, silvery 

 white, and with a well-pronounced median carina; below the eyes the 

 cheeks are very narrow. Antenna?: first joint short, scarcely longer 

 than broad, directed obliquely upward, usually of a light yellow 

 color; second joint small, nearly equilaterally triangular; third joint 

 somewhat falciform, about five times longer than wide, widest on its 

 proximal half, reddish yellow, narrowly black along its upper border. 

 Proboscis black ; at base and tip whitish yellow. Front, when seen 

 obliquely, with a somewhat grayish reflection, with two blackish 

 opaque divergent stripes meeting each other at the yellow base of the 

 antennae and thence extending to the angles of the eyes, the enclosed 

 triangle grayish or brownish ; between the stripes and the eye the 

 silver of the face (but less distinct) reaches to an acute point; in addi- 

 tion to the small bristles near the ocelli there are two strong vertical 

 ones. Thorax black with black bristles and short recumbent golden 

 pile ; humeri and pleura3, except a broad blackish stripe extending 

 down from in front of the wings to the middle coxae, light yellow. 

 Abdomen mostly a reddish or brownish yellow with short black 

 recumbent pile; first segment black above; third, fourth and fifth 

 segments whitish with white pile on the anterior boi'der ; fourth and 

 fifth segments usually quite brownish, sometimes blackish above; in 

 the female the sixth segment is very short, the seventh continued 

 into a long slender blackish ovipostor, quite as long as the body ; at 

 its base it is reddish, just before the tip conspicuously white annulate, 

 at the extreme tip black. Legs: anterior and middle coxa?, femora, 

 tibiae, and metatarsi yellowish white, three last joints of tarsi black- 

 ish ; hind coxae blackish behind, hind femora yellow with short black 

 pile and two brownish or blackish rings on basal and outer thirds ; 

 hind tibiie straight and slender on the basal three-fifths, the distal 

 portion somewhat thickened with a conspicuous white ring before the 

 black tip, tarsi deep black. Wings hyaline, veins black, posterior 

 cross-vein quite oblique, first posterior cell closed just before the tip. 

 Length, 5^-6'""' ; length of ovipositor, 6'""'. 



This species I have found very common in the latter part of July 

 in Connecticut. They frequent in numbers the flowers of the Button 

 JJall {(JephalantJius). 



