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PROCEEDINGS OF TELE NATIONAL MUSEUM 



VOL. 71 



Thoracic hairs varying from entirely black to black or brown with 

 their outer ends, or more, white. 



Petiole almost as long as hind coxa and trochanter together, 

 slightly arched downward on its outer two-thirds; abdomen blue; 

 surface of second and third dorsal plates, particularly near the middle 

 line, more or less covered by very minute, decumbent, white hairs 

 (whitish sericeous) which ma}^ also be present to some extent on the 

 plates next in front and behind (in badly worn specimens this may 

 be worn off and it is always better seen from some angles than others) ; 

 hinder end of last ventral plate slightly truncate; the last three ven- 

 tral plates are less distinctly blue than the others, and sometimes a 

 brownish tinge may be seen here or there on the abdomen. Rarely, 

 the first and second dorsal abdominal plates have a reddish tinge as 

 though they were trjdng to become ferruginous. 



Fig. 3. — Map illustrating the known distribution Podalonia argentifrons (Cresson) 



Tegulae black, sometimes with a brownish tinge, and sometimes 

 with a trace of whitish sericeous. 



Legs more or less whitish sericeous outwardly. 



Length. — Females, 12-17 mm.; males, 11-16 mm. (one male 9 

 mm.). One hundred and forty-three specimens studied. 



Distribution. — I have seen specimens marked "Texas, E^elfrage" 

 which would imply central Texas; Kansas (Hamilton County); 

 Nebraska (Ashland, Harrison, etc.); North Dakota (Sheldon and 

 Bowman) ; Wyoming (Jackson) ; Montana (Helena and Elkhorn 

 Mountains) ; Alberta (several localities) ; British Columbia (Chil- 

 cotin, Keremer, and Nicola) ; Idaho (Rexburg) ; Washington (East- 

 ern Ritzville, Pullman, and Colville) ; Oregon (Harney County and 

 Burns); Colorado (many places) ; Utah (Iron and Beaver Counties) ; 

 Nevada (Ormsby County); California (general); New Mexico and 



