392 The Neio Mexico Bees of the Genus Bombus. 



Mentzelia Rushy i [C. H. T. Tovmsend). Many workers were 

 taken on the Prunella. Those from the Mentzelia are laden 

 with pollen. This sj)ecies ( ? ) was also taken by Mr. C. M. 

 Barber on the Rio Ruidoso, Aug. 28, and by Mr. Otis at the 

 Mescalero Agency. 



This is very close to B. Edivardsii, Cresson, but differs in 



the g having the first two abdominal segments yellow. The 



? var. from Beulah connects the typical prunellce ? with 



Edwardsii^ and it may be that the insects will be found to 



intergrade. B. Putnami, Cress., seems also allied. 



The following table will serve for the separation of the 

 New-Mexico Bombi : — 



Abdomen with a distinct reddish-orange or 



orange-fulvous band 1 . 



Abdomen without any distinct orange or red 



band 3. 



1. Abdomen without black, or with only a few 



black hairs among the yellow ; red band 



on segment 3 or 3 and 4 rufocindiis, Cress. 



Apex of abdomen black 2. 



2. Red band very bright, on segments 2 and 3 ; 



4 yellow ternarms, Say. 



Red band not so bright, on segments 3 and 4. juxtus, Cress. 

 8. Dorsum of thorax yellow, without a band; 

 apex of abdomen black or (improhis) 

 black and ferruginous 4. 



Dorsum of thorax yellow in front, black 

 behind 6. 



Dorsum of thorax with a black band be- 

 tween the wings ; scutellar region yellow. 7. 

 4. Dorsum of thorax entirely yellow ; lower 



edgeof 3'ellosv on abdomen ($) convex. Morriso7ii, Cress. 



Dorsum of thorax with some black hairs 

 centrally ; hind edge of yellow on abdo- 

 men straight 5. 



6. Apex of abdomen all black nevadensis, Cress. 



Apex of abdomen ferruginous ; subapical 



part black iinpfobus, Cress., J • 



6. Base and apex of abdomen black ; segments 



2 and 3 and apex of 1 yellow americanorum, Fabr., 5 . 



Base of abdomen black, apex white ; seg- 

 ment 3 yellow, 4 black Hoicardi, Cress., var. 



Abdomen black, with a yellowish-white 



apex ; no yellow band pcrixmithiis, Ckll. & Port. 



7. Thorax before the band white ; abdomen 



yellow, with no black band appositus, Cress. 



Thorax before the band yellow 8. 



8. Abdomen yellow, with a black apex .... 9. 



Abdomen entirely yellow or ochreous .... americanoi'um, Fabr., J, 

 Abdomen black, with a whitish apex .... perixanthus, Ckll. & Por- 

 Abdomen black, with a white apex and a [ter, var. 



yellow band Hoicardi, Cress. 



