16 PROCEEDINGS OF THE NATIONAL MUSEl'M. vol. 60. 



ments very narrowly blackened ; no A^brissae ; venter piceous, faintly 

 greenish on fourth segment. Yjjes deeply emarginate ; mandibles 

 dark; clypeus strongly rather closelj'^ punctured; mesothorax and 

 scutellum dullish, rugose; anterior angles of prothorax obtuse; 

 area of metathorax rather poorly defined, rugose, with fine striae 

 laterally; hair of hind tibiae entirely pale; abdomen without dis- 

 tinct punctures. 



Male. — Length about 7.5 mm. ; more slender ; eyes strongly con- 

 verging below; mesothorax with disk polished and shining; area 

 of metathorax with very distinct striae; all the femora metallic; 

 ventral segments 3 to 5 strongly blue-green except broad hind mar- 

 gins, their margins simple, but last ventral with a weak longitudinal 

 carina. The wdngs are fuliginous. 



Palm Beach, Florida, 3 females, 1 male, from the C. F. Baker 

 collection. 



Type.— Csit No. 24892, U.S.N.M. 



Belongs to the group Oxystoglossi, and is especiallj'- distinguished 

 by the dark wings, whereby it is easily known from the Floridian 

 A. matilda Kobertson, A. austrhia Robertson and A. f estiva Smith. 

 The head is much broader than in ^4. cyaneoviridis Ashmead, from 

 St. Vincent. 



NOMADA ALBOFASCIATA Smith. 



Male. — Oxbow, Saskatchewan, May, 1907 (F. Knab). 



NOMADA MODESTA Cresson. 



Female. — Form with yellow mark on mesopleura broken into two 

 spots. 



Virginia Beach, Virginia, August 11, 1913 (F, Knab). 



NOMADA MEXICANA Cresson. 



Cresson described the female. A male from Mexico (Baker col- 

 lection 1785) is referred here with confidence. It differs from the 

 female thus: Clypeus with a large pale j'-ellow triangular patch, 

 occupying most of its surface ; posterior orbits entirely black ; meta- 

 thorax without spots, mesopleura with only one spot, a large one on 

 its posterior part; abdominal venter dark, without markings. The 

 apical plate of abdomen is entire, very obtuse, surrounded by dark 

 bristles. 



NOMADA (HOLONOMADA) SUFFOSSA, new species. 



Male. — Length about 12 mm. ; large and robust ; black, with chrome- 

 yellow markings and red legs; readily known by the greatly 

 swollen, oval scape of antennae. Head broad, facial quadrangle 

 about square ; mandibles massive, simple, the very broad base yellow, 

 the middle red, the apex black; the following are yellow, labrum, 



\ 



