Nesting biology and immature stages of the bees centris caesalpiniae centris pallida and the cleptoparasite ericrocis lata hymenoptera apoidea anthophoridae

Rozen, J.G.Jr; Buchmann, S.L.

American Museum Novitates 2985: 1-30


ISSN/ISBN: 0003-0082
Accession: 007586552

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The nesting biologies of two species of the bee genus Centris are described and compared with one another and with information in the literature regarding other Centridini. Information about Centris (Paracentris) caesalpiniae Cockerell was obtained from examination of an extensive emergence aggregation in southern Arizona. Data concerning C. (Xerocentris) pallida Fox came from investigations of several nesting sites, also in southern Arizona. Both species nest shallowly in nearly horizontal desert soils and have similarly shaped brood cells. Nest site requirements, nest architecture and structure, cocoon constructions, larval defecation patterns, provisioning, some aspects of development and adult emergence, and nest parasitism are described and significant interspecific differences pointed out. Biological information on Ericrocis lata (Cresson) (Ericrocini), a cleptoparasitic anthophorid from the nests of C. caesalpiniae, is documented and confirms the suspected association of Ericrocis with Centris. The mature larvae of these three bee taxa are described taxonomically as are pupae of C. caesalpiniae and E. lata.