THE CANADIAN ENTOMOLOGIST. 327 



In sculpture and structure this species comes nearest to C. 

 abdominalis, Guer., but that has the abdomen all red, is larger and 

 different in various details. 



Coelioxys S/ossoni, n. sp. 



Head and thorax black, dullish ; abdomen shining, first three 

 segments ferruginous, the rest black ; wings fulvous, darker apically ; 

 antennae dark brown to black. 



9 . Length, 1 2 mm. Face covered with appressed whitish 

 pubescence, which hides the surface of the tegument; head above 

 an imaginary line across posterior ocelli deeply punctured, the punctures 

 separated irregularly, none very far apart. There is an impunctate line 

 extending down to the margin of the eye from each lateral ocellus; 

 a compact, spade-shaped, raised area in front of anterior ocellus has 

 its borders impunctate, dull, the space within punctured. Cheeks 

 punctured, with white appressed pubescence not so dense as on the 

 face ; dorsulum with deep, good-sized punctures not all the same 

 distance apart, some very close, not at all widely separated, an impressed 

 line over the anterior half of dorsulum in the middle, a narrow band of 

 yellow pubescence extends to each side of the impressed line, curved and 

 meeting the tegulre at the sides; scutellum punctured, much like dorsulum, 

 duller, the spines short and rounded. Mesopleura flattened in front, 

 giving the side a strong edge, the sides of mesopleura punctured, much 

 like the dorsulum, pubescence very sparse, excepting on the margins, 

 where it is abundant, and on the sides of the metathorax. Wings with 

 space between first transverse cubitus and first recurrent nervure on the 

 cubitus a little greater than that between the second transverse cubitus 

 and the second recurrent nervure on the cubitus ; transverse median 

 nervure interstitial ; nervures and stigma dark brown, almost black ; 

 tegulas testaceous. Abdomen about twice as long as broad at base, first 

 segment with well-defined large and small punctures, the larger ones 

 a little smaller than those on dorsulum, second segment with much the 

 same-sized punctures as those on the first, an impunctate narrow band 

 across the middle. On the remaining segments the pattern is the 

 same, excepting the apical segment, the puncture on each segment a 

 little smaller than on the preceding, the impunctate band wider ; apical 

 segment with a medial longitudinal impunctate raised line ; apical 

 segment less than twice as long as broad at base, its outline that 

 of a cone slightly pinched in the middle, the apex rounded ; dorsal 



