HENRY J. FRANKLIN. 199 



Fig. 154. — Boinbus pulcher Cresson. Ventral aspect of right clasper 



of male. x80. 

 " 155. — BoJiibus coccineus Friese. Outer spatha of male. x25. 

 " 156. — Boinbus sononics Howard. Dorsal aspect of right clasper 



of male. x80. 

 " 157. — Bombus borealis, genital guide of queen. x68. 

 " 158. — Bombus polaris, dorsal aspect of left side of genitalia. x80. 



PLATE XIX. 

 Fig. 159. — B omb us pullaius new s^eciQ?,. Dorsal aspect of right clasper 



of male. x80. 

 " 160. — Bombus niexicanus Cresson. Ventral aspect of left side of 



genitalia of male. x80. 

 " 161. — Bombus atratus new species. Dorsal aspect of left clasper 



of male. x80. 

 " 162. — Boinbus mediiis Cresson. Dorsal aspect of right clasper of 



male. x80. 

 " 163. — Bombus niedius, ventral aspect of leftside of genitalia. x80. 

 ' ' 164. — Bombus niexicanus^ dorsal aspect of left clasper of male. x80. 

 " 165. — ^<?;«<5«5/!>o/ar/j-, inner spatha of male. x48. 

 " 166. — Boinbus pullatus, ventral aspect of left side of genitalia of 



male. x80. 

 " 167. — Bombus atratus, ventral aspect of left side of genitalia of 

 male. x80. 



PLATE XX. 

 Fig. 168. — Bom,bus carolinus Linnaeus. Outline (not showing the 

 genital hairs) of dorsal aspect of right side of genitalia of 



male. x80. 

 " 169. — Bombus affinis, genital guide of worker. x68. 

 " no.— Bombus dahlbomii, outline (not showing the genital hairs) 



of dorsal aspect of left side of genitalia of male. x80. 

 " 171. — Bombus dolichocephalus, outline (not showing the genital 



hairs) of dorsal aspect of right clasper of male genitalia. 



x80. 

 " 172. — Bombus impatiens, genital guide of queen. x68. 

 " 173. — Boinbus kirbyellus, genital guide of queen. x68. 

 " 174. — Boinbus dah/bomii, outer spatha of male. x25. 

 " 175. — Bombus brac/iycep/ia/us HandVivsch. Outline (not showing 



the genital hairs) of dorsal aspect of right side of geni- 

 talia of male. x80. 

 " 176. — Bombus affinis, genital guide of queen. x68. 

 " 177. — Bombus ephippiatus Say. Outline (not showing the genital 



hairs) of dorsal aspect of left clasper of male genitalia. x80. 

 " 178. — Bombus funebris, outline (not showing the genital hairs) of 



dorsal aspect of left side of male genitalia. x80. 



TRANS. AM. ENT. SOC, XXXIX. 



