1912] Cockerell—New Bees from Brazil 61 



(6.) Porto Velho {Mann & Baker). This is located seven kilometers north of the 

 old native town, San Antonio, which is just below the lowest falls of the 

 Madeira, State of Amazonas. September, 1911. 



Megachile microsoma n. sp. Trigona fulpiventris Guer. 



" lenticula Vachal. " guianas Ckll. 



curvipes Sm. " silvestriana Vachal. 



" brasiliensis D. T. " longipes Sm. 



flabellata Vachal. " manni n. sp. 



Coelioxys ardescens n. sp. " pellucida n. sp. 



Euglossa cor data L. " sp. 

 Centris heterodonta n. sp. 



(7.) Itacoatiara {Mann & Baker). "The town is situated on the north bank of the 

 Amazon, about forty miles below the mouth of the Rio Madeira. The 

 bees were taken about some orchids, which had been brought aboard an 

 anchored boat." 



Euglossa cordata (L.) 



Matto Grosso. 



(8.) Abund {Mann & Baker). "On the Rio Madeira nearly opposite mouth of 

 Rio Abund. ' ' September 1911. 



Xylocopa viridis Sm. Centris tarsata Sm. 



Eulwma dimidata Fabr. Trigona pallida Latr. 



" manni n. sp. " manni n. sp. 



Melissa decorata Sm. " rhodoptera n. sp. 



Euglossa cordata L. " sp. 



Melipona rufiventris Lep. 



" abunensis n. sp. 



(9.) Madeira-Mamore R. R. Camp 41 {Mann & Baker). "Located on Rio Madeira 

 306 km. from Porto Velho." September 1911. 



Euglossa cordata (L.) 

 Trigona rhodoptera n. sp. 

 " sp. 



(10.) Madeira-Mamore R. R. Camp 43. {Mann & Baker). "On Rio Mamore 

 325 km. from Porto Velho." September 1911. 



Megachile lenticula Vachal. 

 Centris bakeri n. sp. 



The following abbreviations are used in the descriptions, in accordance with 

 my usual custom: s. m., submarginal cell; r. n., recurrent nervure; t. c, trans- 

 verso-cubital nervure; t. m., transverso-medial nervure; b. n., basal nervure. 



