Mesoxaea Hurd & Linsley, 1976

Engel, Michael S., 2015, A review of the genera and subgenera of Oxaeinae (Hymenoptera: Andrenidae), Journal of Melittology 2015 (52), pp. 1-18 : 4

Genus Mesoxaea Hurd & Linsley

DIAGNOSIS: Male without pale maculations on clypeus, labrum, mandible, and antenna ( Figs. 12 , 17 ); mandible simple apically ( Fig. 12 ); maxillary palpi composed of six palpomeres; metasomal terga brownish black or black, not partly or largely reddish ( Figs. 7–10 , 13–15 ); metasomal tergum VI (male) and tergum V (female) with long, conspicuous tufts of white setae at sides ( Figs. 8, 10 , 14 ); apical margin of male metasomal sternum VIII deeply emarginate medially (refer to figures in Hurd & Linsley, 1976); gonobase greatly reduced, ringlike, much wider than long, not tapering basally; gonostylus partially differentiated from gonocoxae, with setae apically (refer to figures in Hurd & Linsley, 1976); outer lateral apex of volsella with dorsal lobed extension, outer margin from narrow ventral apex to widest point apical from apodeme frequently deeply concave before mediolateral process, process frequently protrudent (refer to figures in Hurd & Linsley, 1976); penis valve not elongate, only slightly surpassing gonostylar apices, with prominent ventral subapical ridge with apicolateral setae, not extending to thin lateral process (refer to figures in Hurd & Linsley, 1976).

Figures

Figures 7–12. Photographs of Mesoxaea (Mesoxaea) nigerrima (Friese). 7. Dorsal habitus of female. 8. Lateral habitus of female. 9. Dorsal habitus of male. 10. Lateral habitus of male. 11. Facial view of female. 12. Facial view of male.

Figures 13–17. Photographs of Mesoxaea (Heteroxaea) rufescens Hurd & Linsley. 13. Dorsal habitus of female. 14. Lateral habitus of female. 15. Dorsal habitus of male. 16. Facial view of female. 17. Facial view of male.