May, '07] ENTOMOLOGICAL NEWS. IQ9 



. Taken on Rhus typhina, July 10; Epilobiwn angusti- 

 foUuiu, July 23; Pontcdcria cordata, July 20; Falcata comosa, 

 August 22; and Trifolinin pratcnsc, September 18. 



$ . The male may be easily distinguished from the worker 

 bv a long tuft of pale yellow hair below the antennae. On 

 Pojitcdcria cordata, July 20; and Epilobiuin angiistifolinin, 

 July 30. 



Bombus bimacnlatus Cr. 



1863, Bombus biinaciilafns Cr., c?, Proc. Ent. Soc. Phil., 2, 92. 



This species is probably only a variety of B. vagans Sm., 

 from which it differs chiefly in having a round black spot on 

 each side of the second abdominal segment. This character 

 is, however, variable, and I have specimens which have the 

 second segment entirely yellow. The female of B. biniaciilatiis 

 is rather common on Rhodora canadcnsis and I have also taken 

 it on Diervilla trifida. 



Psithyrns ashtonii Cr. 



1864, Apat/nts ashtoni Cr.. ?, Proc. Ent. Soc. Phil., 3, 42. 

 1864, Apathits ashtoni Packard, $, Proc. Essex Inst, 4, 118. 

 1896, Psithyrus ashtonii D. T., Cat. Hym., 10, 565. 



The female was taken on Vacciniuin, June 16; and Solidago 

 juncca, August 4. The male, which is undescribed, is smaller 

 than the female, and' the yellow and black pubescence is simi- 

 larly distributed, except that the first segment is clothed later- 

 ally with lemon-yellow hair. Observed on Epilobinin amgusti- 

 foliiiiu, July 23; Aralia hispida, July 27; and the goldenrod, 

 August 21. In fresh specimens the pubescence is a bright 

 lemon-yellow, fading with age to grayish-yellow. 



Psithyrus laboriosus Fabr. 



1804, Apatluts laboriosus Fabr., ?, Syst. Piez., p. 352. 

 1854, Apathus citriiius Sm., c?. Cat. Hym. Brit. Mus., 2, 385. 

 1863, Apatlms laboriosus Cr., $, Proc. Ent. Soc. Phil., 2, in. 

 1863, Jpii tints citriiius Cr., J 1 , Proc. Ent. Soc. Phil., 2, 112. 



1863, Apathus contiguits Cr., < Proc. Ent. Soc. Phil., 2, 112. 



1864, Apathus citriiius Packard, c?, Proc. Essex Inst., 4, 119. 

 1864. Apathus contigiuis Packard, c?, Proc. Essex Inst.. 4, 119. 

 1903, Psithyrns laboriosus Robt., $, <j*, Trans. Am. Ent. Soc., 29, 178. 



The female has been collected on Pontcderia cordata, July 

 21 ; Imtla hclaiium, August 6; and Solidago, September 3. 



