HENRY J. FRANKLIN. 255 



72. Pile on abdomen long and loose ; that on pleura tending to be 



whitish ; malar space fully one-third the length of the eye. 



kirbyellus. 

 Pile not especially long and loose on abdomen ; that on pleura yel- 

 low ; malar space not one-third the length of the eye 77. 



73. Second and third dorsal abdominal segments covered with ferru- 



ginous-red pile g'elidus. 



Second and third segments not so covered 74. 



74. Middle portion of third abdominal segment above bearing con- 



siderable light pile, being sometimes entirely covered with 



it 75. 



Third dorsal abdominal segment bearing other than black pile 

 only near the lateral margins kirbyelllis. 



75. Apical abdominal segments bearing more or less reddish-ferrugin- 



ous pile polaris. 



Apical segments not bearing reddish pile kincaidii. 



76. Malar space as long as its width at the apex gelidus. 



Malar space not as long as its width at the apex rufocinctus. 



77. Dorsum of thorax clouded by a thorough mixing of the yellow and 



black pile bolster!. 



Dorsum of thorax not with clouded pile ; interalar band distinct. 



couperi. 



78. Abdomen with a large amount of ferruginous-red pile above. 



ternarius. 

 Abdomen with no ferruginous pile couperi. 



79. The second dorsal abdominal segment clothed with ferruginous- 



red pile sylvicola. 



The second segment without ferruginous pile pleuralis. 



Table for Separation of Males of Bombus. 



1. Eyes much swollen, bulging out from sides of head ; ocelli placed 



well below the supra-orbital line ; malar space short 2. 



Eyes not bulging noticeably; ocelli near supra-orbital line 13. 



2. Pleura bearing yellow pile nearly or quite to bases of legs 3. 



Pleura with yellow pile not nearly reaching bases of legs 4. 



3. More than two dorsal segments of the abdomen covered with yel- 



low pile 6. 



Not more than two of the abdominal segments thus covered 7. 



4. Hind femora with little or no light or yellow pile crotcliii. 



Hind femora with considerable light or yellow pile 5. 



5. Last three abdominal segments entirely covered with black pile. 



morrisoni. 

 Not all of the last three segments so covered rufocinctus. 



6. Third antennal segment as long as segments four and five 



together 12, 



TRANS. AM. ENT. SOC, XXXVIII. 



