March, 1922.] Chamberlin: The Genus Pcecilonota. 57 



stance; tibia coppery or dull grayish; tarsi bluish, greenish or bluish- 

 green. 



Length, males, 9.75-16.3 mm.; width, 3.25-6.60 mm. 



Length, females, 11.25-18.00 mm.; width, 3.90-7.00 mm. 



This is the most common species of the genus found in the United 

 States, but very little concerning its habits and life history seems to 

 be known. Mr. H. B. Kirk has reared it from Saperda concolor galls 

 on large-toothed aspen (Populus grandidentata) , collected at Mulford, 

 Pennsylvania. Several writers state that specimens have been " beaten 

 from poplar " and " taken resting on poplars." 



Blanchard^ says : 



"P. cyanipcs Say. One specimen on the trunk of a poplar. June, 

 Mass." 



Frost (letter). 



"P. cyanipcs; Providence, R. L, beaten from poplar by L V. 

 Nylen." 



Distribution: Awame, Manitoba, VII-2; Ontario; Edmonton, Al- 

 berta, VII-30; Millers, Ind., VII-2; Wales, Me., VIII-3; New Jersey; 

 Framingham, Mass., VI-6, Salix; Cicero, 111., VIII-i ; Buffalo, N. Y.; 

 White Fish Point, L. S. ; Texas; Isle Royal, Mich.; and Awame, Mani- 

 toba (Swaine), August 9. Blatchley reports this species as occurring 

 on pine, sycamore, and ash in northern Indiana. It is very doubtful 

 if it breeds in any tree other than Salix and Populus. 



Pcecilonota cyanipes var. californica new variety. Plate V, figs. 7 and 8. 



-A. western form differentiated by a broader, more robust body ; thorax 

 angulated and widest at the middle, more coarsely and unevenly punctured ; 

 apices of elytra less prolonged and less divaricated, always cupreous. The 

 last ventral segment differs as shown in figures 5 and 7 of Plate VII. Some 

 fifty specimens examined, all are very uniform in color and shape except a 

 single example from Yukon (which is almost black). General ground color 

 is coppery bronze with elongate raised areas of a greenish color on the elytra. 



Taken on aspen (Populus tremiiloides) at Vade, California, by Mr. 

 H. E. Burke. Quite common on the same tree at Strawberry and 

 Phillips Station on the Placerville-Tahoe road, Eldorado County, Cali- 

 fornia, where the author took some thirty specimens in about one hour 



1 Blanchard, F., Entomologia Americana, Vol. V, 1889, page 30. 



