138 THE CANADIAN ENTOMOLOGIST. 



segment entirely shining. Legs yellow ; anterior and middle femora with 

 a wide black stripe, attenuated on the apical part on upper side, reaching 

 into the apical third of the femora. Posterior femora with a very broad 

 median band and a very small apical spot black. All the tibire yellow, 

 the posterior pair more brownish, especially at tlie base and apex. Tarsi 

 yellowish, the posterior pair somewhat brownish. Wings hyaline. Length, 

 9 mm. 



One specimen : British Columbia. 



This species differs from H. ha/natns, Loew, in the broad abdomen, 

 although it agrees rather closely with the description of that species in 

 coloration. From H. divisus, Loew, it differs in having the face not 

 broadly truncate on the lower portion, but sharply conical ; in the absence 

 of black markings on the apical portion of the anterior tibiae, the absence 

 of a light stripe in the median dorsal black one, and very greatly in the 

 maculation of the abdomen. From If. inie(^er, Loew, it differs in not 

 having complete abdominal bands, in the darker femora and the absence 

 of the facial stripe ; and from H. obsoletus, Loew, in the distinct markings 

 of the thorax and the darker legs. 



28. Helophihts laii/roiis, Loew. 



Several specimens : Cook's Inlet., Alaska ; coll. L. L. Dyche. 



29. Helophilus divisus, Loew ; Centur. N. A. Dipt., iv., 78. 



I have a male and a female specimen of this species which were taken 

 in coitu. They bear no locality label. Another male bears the label 

 " Westville, N. J." The males differ in the following respects from the 

 females in the maculation of the abdomen. Second segment yellow 

 except an opaque black anterior band not reaching the lateral margins by 

 its own width, about one fifth of the length of the segment, a similar 

 posterior band narrowed at the ends but reaching the lateral margins, and 

 a broad median longitudinal band connecting the two, the posterior 

 margin yellow with a small pollinose spot in the middle. Second segment 

 yellow with the black markings similar but less extensive, the anterior 

 band only a third of the width of the segment, the posterior one with the 

 sides slightly arcuate, the interior corners of the yellow spots and a 

 large median posterior spot between the arcuate bands pollinose. Fourth 

 segment entirely yellow pollinose except a slender inverted Y-shaped 

 mark, the base of which touches the anterior margin of the segment, and 

 the broadly divaricate segment entirely pollinose. 



