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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 57. 



abdomen in the female largely red in the middle, in the male more or 

 less so; coxae more or less black or piceous at least at base; palpi, 

 clypeus, face at sides and below antennae, scape and pedicel beneath, 

 tegulae, and legs reddish, hind tibiae fuscous at apex, tarsi yellowish. 

 The male differs from the female principally in color, the red of 

 the abdomen being confined largely to the sutures and the sides of 



Fig. 2.— Coleockntrus occidentaus Cresson. Adult female enlakged about 3 dumeters. 



tergites 2 and 3, the entire yellow face and the paler appendages 

 the hind coxae, however, being frequently entirely black or piceous, 

 though occasionally largely testaceous. 



The normal size of this species is in the neighborhood of 25 mm., 

 but one of the females, taken by W. M, Mann on San Juan Island 

 Washington, is only 17 mm. long. 



