1899.] NATURAL SCIENCES OF PHILADELPHIA, 463 



are much more distinct than iu Spinolce, and the clypeus seems 

 longer. 



Montezumia ferruginea Sauss. 



Corumba, February, April; Pedra Branca, April. Four speci- 

 mens. These represent the entirely ferruginous form mentioned 

 by Saussure. In one example the abdomen, except first segment, 

 tends to brownish or subfuscous. 



Montezumia anceps Sauss. 



Rio de Janeiro, November; Uacarizal, February. Two speci- 

 mens probably represent this species. 



Montezumia macrocephala Sauss. 



Fifteen males, eight females. Chapada, March, April, October. 



Montezumia carinulata (Spin. ) Sauss. has maxillary palpi six-, 

 the labial palpi four-jointed. I have therefore transferred it to 



Noiioiiia. 



Monobia angulosa Sauss. 

 Numerous specimens. 



Monobia funebris Grib. 



Four Specimens. Corumba and Mararii, April; Santarem. I 

 am inclined to I'egard this as a variety of M. apicaUpennu Sauss. 



Monobia curvata n. sp. 



?. — Black; head except part of front, scape, pedicel and base 

 of first flagellum joint, thorax above almost entirely including the 

 upper portions of meso- and metapleura\ fore legs except base, the 

 medial and hind femora and tibiic in front, rufous; the dorsulum 

 and scutella are more or less blackish, sometimes these parts are 

 entirely black; inner orbits beneath and spot at base of mandibles, 

 yellow; wings blue-black, with a narrow pale apical margin; cly- 

 peus subpyriform, with large rather shallo.w punctures, its fore 

 margin subtruncate, subdentate laterally; front coarsely punc- 

 tured; space between hind ocelli equal to or slightly less than that 

 between them and eyes; thorax with tolerably deep, close punc- 

 tures, more separated on dorsulum; middle segment above with 

 much larger punctures, the concave area smooth, sides roughly 

 angulate or subdentate, but not spinose; dorsal surface of abdo- 

 men with fine, close punctures, those on second segment sparse 



