HENRY J, FRANKLIN. 197 



Fig. 94. — Psithyrus laboriosus, outline of dorsal aspect of left clasper 



of genitalia. x20. 

 " 95. — Psithyrus tricolor, dorsal aspect of left side of genitalia. x20. 

 " 96. — Psithyrus suckieyi, ventral aspect of right side of genitalia. 



x20. 

 " 97. — Psithyrus variabilis, ventral aspect of right side of genitalia. 



x20. 

 " 98. — Psithyrus tricolor, wentvaX aspect of right side of genitalia. 



x20. 

 " 99. — Psithyrus ashioni, ventral aspect of right side of genitalia. 



x20. 



PLATE XIII. 



Fig. 100. — Bonibus {Bombias) nevadetisis, ventral aspect of outer spatha 

 of male. xl7. 



101. — Bombusfervidus {Yahricms.) . Inner spatha of male. xl7. 



102. — Bonibus californicus, end of sagitta and uncus of male. x40. 



103. — Psithyrus interruptus, outline of labrum of queen. xl7. 



104. — Bonibus ternarius, spiracle bearing plate of abdomen of 

 queen. xl7. 



105. — Bonibus vac;ans, inner spatha. xl7. 



106. — Bonibus {Bombias) nwrrisoni, spiracle bearing plate of ab- 

 domen of worker. xl7. 



107. — Bonibus vagatis, outline of labrum of queen. xl7. 



108. — Bonibus niixtus, dorsal aspect of end of left clasper. x40. 



109. — Bonibus ynixtus, ventral aspect of end of right clasper. x40. 



110. — Bombus fernaldi, ventral aspect of end of right clasper. x40. 



111. — Bonibus affinis, ventral aspect of outer spatha. xl7. 



PLATE XIV. 



Fig. 112. — Psithyrus variabilis, ventral aspect of outer spatha. xl7. 



" 113. — Bonibus affinis, inv^QX ■s,^2X\\a.. xl7. 



" 114. — Bonibus biniaculatus , outline of labrum of queen. xl7. 



" 115. — Bonibus kirbyellus, apex of inner spatha. xl7. 



" 116. — Bonibus {Bombias) nevadensis, spiracle bearing plate of ab- 

 domen of queen. xl7. 



" 117. — Bonibus {Bombias) crotchii, ventral aspect of outer spatha. 

 xl7. 



" 118. — Bonibus californicus, spiracle bearing plate of abdomen of 

 queen. xl7. 



" 119. — Bonibus occidenialis Greene. Ventral aspect of left side of 

 genitalia. xl7. 



" 120. — Bonibus occidenialis, dorsal aspect of left side of genitalia. 

 xl7. 



" 121. — Bonibus affinis, end of sagitta of male. x40. 



TRANS. AM. ENT. SOC, XXXIX. 



