280 PROCEEDINGS OF THE ACADEMY OF [1897. 



of third discoidal and beyond, second submarginal rhornboidal, re- 

 ceiving first recurrent vein beyond middle, third submarginal larger, 

 narrowed about one-third above and receiving recurrent vein con- 

 siderably before the middle. Length 10 mm. 



Rio de Janeiro (November). One specimen. To the naked eye 

 the insect has a blue-gray appearance, due to the pile with which it 

 is clothed. The third submarginal is differently shaped from that 

 of C. machetes Kohl. 



Calicurgus machetes Kohl. 



A specimen from Santarem is perhaps this species. 

 Calicurgus idoneus Kohl. 



Santarem. One specimen. • 



Calicurgus nuhilus n. sp. 



9 . — Black ; face, clypeus, thorax on sides and beneath, middle 

 segment and abdomen more or less, with silvery pile, especially 

 obvious in certain lights, that on the abdomen rather sparse and less 

 silvery ; clypeus transverse, anteriorly shining and with large sparse 

 punctures ; front smooth or indistinctly punctured, hardly impressed ; 

 eyes strongly converging above, reaching base of mandibles, separ- 

 ated at the top by a distance scarcely equalling length of fourth 

 antennal joint ; space between hind ocelli perhaps a little greater 

 than that between them and eyes ; pronotum subangulate behind ; 

 middle segment rounded, somewhat shining not impressed ; legs not 

 very strongly spinose, serration of hind tibire distinct, their longer 

 spur equal to nearly two-thirds the length of first hind tarsal joint; 

 abdomen subpetiolate, the transverse impression of second ventral 

 segment in the middle and almost S-shaped, longer pubescence of 

 abdomen pale; base and apex of superior wings and inferiors except 

 apex, subhyaline, the greater portion of the superiors is covered by 

 a fuscous cloud ; second submarginal rather rhornboidal, narrowed 

 about one-quarter above and receiving the recurrent vein a little 

 beyond middle, third submarginal larger narrowed nearly one-half 

 or about two-fifths to the marginal and receives the recurrent vein 

 between base and middle. Length 8-10 mm. 



Chapada (January, March, April, November) ; Santarem. Seven 

 specimens. The species is easily recognized by the wings. 



Pepsis aurozonata Sm. 



One specimen from Santarem. 



