May, '07] ENTOMOLOGICAL NEWS. 199 



$ . — Taken on Rhus typhina, July 10 ; Epilobium angusti- 

 folium, July 23; Pontcderia cordata, July 20; Falcata comosa, 

 August 22 ; and Trifolium pratense, September 18. 



S . — The male may be easily distinguished from the worker 

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

 Pontcderia cordata, July 20; and Epilobium angustifolium, 

 July 30. 



Bombus bimaculatus Cr. 



1863. Bombus bimaculatus Cr., d\ 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. bimaculatus 

 is rather common on Rhodora canadensis and I have also taken 

 it on Diervilla trifida. 



Psithyrus ashtonii Cr. 



1864, Apathus ashtoni Cr., ?, Proc. Ent. Soc. Phil., 3, 42. 

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

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



The female was taken on Vaccinium, 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 Epilobium angusti- 

 folium, 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 laboriosns Fabr. 



1804, Apathus laboriosus Fabr., $, Syst. Piez., p. 352. 

 1854, Apathus citrinus Sm., d\ Cat. Hym. Brit. Mus., 2, 385. 

 1863, Apathus laboriosus Cr., $, Proc. Ent. Soc. Phil., 2, III. 

 1863, Apathus citrinus Cr., o", Proc. Ent. Soc. Phil., 2, 112. 



1863. Apathus contiguus Cr., 6*, Proc. Ent. Soc. Phil., 2, 112. 



1864, Apathus citrinus Packard, o", Proc. Essex Inst., 4, 119. 

 1864. Apathus contiguus Packard, 6*, Proc. Essex Inst.. 4, 119. 

 1903, Psithyrus laboriosus Robt., ?, o*, Trans. Am. Ent. Soc, 29, 178. 



The female has been collected on Pontcderia cordata, July 

 21; Inula helenium, August 6; and Solidago, September 3. 



