Dec., '09] K. \TOMOLOGICAL NEWS 417 



with about three ridges on each side. The trochanters are largely red, 

 the femora largely black, all the tibiae and tarsi are red. Abdominal 

 segments 1-3 are chestnut red, segment 4 is black in the center, seg- 

 ment 5 largely black ; segment r is nearly impunctate, with a few, fine, 

 widely scattered punctures; the other segments have very fine, shallow 

 punctures except on the apical margins. 



One specimen from Great Falls, Ya., July 17, N. Banks. 

 S. Distolns differs from 5". (Dialonia) antcnnariae, which also 

 has only two submarginal cells, in its larger size, dentate man- 

 dibles, black mesothorax with coarser punctuation, venation 

 and color of abdomen. 



OSMIA. 

 Osmia lignaria Say. 



9. Falls Church, Va., April 18; Glencarlyn, Va., May 4, 

 N. Banks. $ . Falls Church, Ya., April 18, N. Banks. 



Osmia melanotricha Lov. and Ckll. 



9. Glencarlyn, Va., May 4; Great Falls, Va., June 25, 

 S. distolns differs from S. (Dialonia) antcnnariae, which also 

 been found in Colorado. The type locality is Maine. 



Osmia pumila Cr. 



9. Great Falls, Va., May 22, June 7; Glencarlyn, Va., 

 May 4, May 10, N. Banks. 



$ . Falls Church. Ya., April 26 on flowers of Waldsteinia; 

 Glencarlyn, Va., May 4, N. Banks. 



Osmia purpurea Cr. 



9 . Falls Church, Va., May 24, June 2, June 24, N. Banks. 

 This species, says Cresson, may be readily distinguished by the 

 dark purple coloring and the narrow fasciae of the abdo- 

 men. The mandibles are 4-dentate. 



Osmia rustica Cr. 



$ . Falls Church, Va., May 24, June 2, N. Banks. 



Osmia georgica Cr. 



9 . Falls Church, Va., May 29, N. Banks. 



ERRATUM. In ENT. NEWS. Vol. XX, No. 3, March, 1909, on page 124 



for S. mibilus read S. nephelotus. 



