THE CANADIAN ENTOMOLOGIST. 135 



dish posteriorly, where there is a complete narrow reddish cross-band, 

 pilose as in the preceding segment, the black markings consist of a tri- 

 angular spot, the base of which extends two-thirds of the width of the 

 segment behind, the sides of which are concave and the apex of which 

 is expanded unto a small elliptical spot extending less than one-third of 

 the width of the segment, touching the anterior margin. Fourth segment 

 with the lateral margins narrowly and the posterior margins more widely 

 yellow, for the rest black with a broad subinterrupted poUinose band, 

 leaving a narrow anterior band and a posterior triangle shining black, pile 

 of posterior third black. Femora black, apical third of anterior and 

 middle pairs yellow, an obscure reddish spot near the apex of the posterior 

 pair; anterior tibi?e yellow on basal half, intermediate entirely and pos- 

 terior with only an apical band. All the tarsi except the intermediate 

 metatarsi black ; the anterior tarsi, especially the metatarsi, are very 

 evidently widened and swollen. The posterior femora slightly thickened, 

 their tibice slightly arcuate, unarmed. Wings cinereous hyaline. Length, 

 II mm. 



One specimen : Minnesota. 



This species belongs to the groenlaiidicus group. It is easily separa- 

 ble from glacialis and borealis by the only gently concave face. From 

 groenlandicHS it differs: (i) The median dorsal stripes are not very 

 narrow, but broad, distinct, and reach the scutellum, the lateral thoracic 

 stripes are not obsolete posteriorly ; (2) the femora are more extensively 

 yellow at the apex ; (3) the pile of the thorax is everywhere yellow. 

 From H. Dychei, Will., it differs in the less robust and less pilose body 

 throughout, in the outline of the face, which in that species is obtusely 

 conically produced and which is perpendicular below the middle in this 

 species, in the fact that the facial stripe ends abruptly before the base of 

 the antennae ; the median dorsal stripes are wider and reach the scutellum, 

 the scutellum is largely black pilose (in Dychei the pile of the scutellum 

 is entirely yellow), the apical femoral bands are wider, and there is a much 

 greater extent of yellow on the third and fourth abdominal segments. 



Mr. W. A. Snow has a note concerning a specimen of a species of 

 HelopJiiliis of the groenlandiciis grou[) (Kansas Univ. Quart, iii., 243) 

 which in some respects differs from groenlandiciis [jrecisely as this species 

 does. From the short note given by Mr. Snow I am not certain that his 

 specimen belongs to a species distinct from mine. In his specimen the 

 pile of the dorsum is entirely yellow, the median stripes reach the 



