584 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.40. 



tarsus; first abscissa of the radius longer than second, third much 

 longer than the second but shorter than the fourth; abdomen with 

 distinct, small, separate punctures; pygidium not sharply defined, 

 with large, separate punctures, about one and a half times as long as 

 broad at base, apex obtusely rounded. Black; base of mandibles 

 scape beneath, flagellum beneath apically, tegulae, legs except a black 

 spot on coxae above, and abdomen red; head and thorax with silvery 

 pubescence, abdomen almost nude; wings hyaline, iridescent venation 

 testaceous. 



A paratype has the second and third abscissa of the radius subequal. 



Male. — Length 6.25 mm. Anterior margin of the clypeus rounded 

 out, hardly dentate; sides of propodeum not as strongly striate as in 

 the female; mandibles, antennae, coxae, anterior femora, bases of the 

 four posterior femora black; abdomen ornamented with silvery pile. 

 Except where mentioned, the male agrees with the above description 

 of the female. 



Las Cruces, New Mexico. Type female collected on staminate 

 flowers of Croton neomexicanum September 25, 1895; two paratype 

 females collected October 5, 1895; type male collected September 23, 

 on Gutierrezia sarothrse, var. microcephala. All were collected by 

 Prof. T. D. A. Cockerell. 



Type.— Cat. No. 13765, U.S.N.M. 



Genus NOTOGONIA Costa. 



NOTOGONIA BELLA, new species. 



Seems to be closest structurally to Notogonia truncata Cameron, but 

 that species is colored differently. 



Female. — Length about 10 mm. Clypeus with distinct, median size 

 punctures, apical margin shining and with a rounded notch in the 

 middle; head and dorsulum finely granular, scutellum somewhat 

 shining, with distinct punctures ; depression from the anterior ocellus 

 nearly breaking all the way through the crest; depression above 

 lateral ocelli triangular; scape carinated ventrally; third and fourth 

 antennal joints equal; propodeum granular; longitudinal furrow 

 of propodeum dorsally shallow; carina separating the posterior face 

 from the dorsal aspect not sharp; femora rather robust; abdomen 

 dull; pygidium (under high power) covered with short spines; third 

 cubital cell a little wider on the radius than the second. Black; 

 femora and tibiae clear red; covered with close golden pile, longer 

 and denser on the propodeum. Wings light amber-yellow, with a 

 apical third streaked with lavender; venation except the pale brown 

 costa and stigma, the color of the wing. 



Tabernilla, Canal Zone, Panama. One female collected June 4, 

 1907, by Mr. A. Busck. 



Type.— Cat. No. 13766, U.S.N.M. 



