ORTALID^E — ANACAMPTA. 129 



the end ; its coloring and the pollen upon it are the same as 

 those on the abdomen. Coxae and feet blackish-brown ; the 

 second coxal joint, the tip of the femur, the basis of the tibia; and 

 the extreme tip of the middle tibiae are yellowish-red. In the 

 European specimens this yellowish-red coloring has often a much 

 greater extent and also occurs at the basis of the tarsi ; it is pro- 

 bable that the same is the case with some American specimens. 

 The surface of the wings is much more whitish than in the other 

 species; the first spot is small, although it reaches from the first 

 to the fourth vein; the spot at the end of the stigmatical cell is 

 also comparatively small, does not quite reach the second longi- 

 tudinal vein, and remains quite separated from the spot covering 

 the small crossvein ; the spot covering the posterior crossvein is 

 of a moderate breadth ; the spots upon the ends of the longitu- 

 dinal veins are of the ordinary size. 



Hab. Yukon River, Alaska (Kenuicott) ; Nebraska (Dr. 

 Hayden). 



Observation. — Of this species I possess, only a male from 

 Nebraska and a female from Hudson's Bay Territory. The most 

 careful comparison with specimens of Geroxys canus from the 

 southern part of middle Europe and from southern Europe has 

 not revealed any character indicative of a specific distinctness of 

 the European and the American specimens. 



Gen. V. ANACAMPTA Loew. 



Charact. — Head hemispherical, rather than round ; front broad, somewhat 



narrower above ; the vertical diameter of the eye much larger than 



the horizontal one; cheeks broad. 

 Third antennal joint distinctly cut out upon its upper side ; pointed 



at the end. 

 Thorax upou its middle provided with bristles near the posterior 



margin only. 

 First longitudinal vein with bristles upon its end only ; the end of the 



fourth longitudinal vein curved forward in a striking manner; 



posterior angle of the anal cell sharp, but not prolonged in the 



shape of a lobe. 



The genus Anacampta contains species of large size, which 

 resemble Ceroxys in their general appearance, as well as in the 

 picture of the wings. They differ, however, sufficiently in the 

 black color of the body, in the thoracic dorsum not being provided 

 with bristles as far as its anterior part and in the conspicuous 

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