NOMADA. 99 



NOMADA, Fabr. 



1. Nomada subpetiolata. 



Female. Length 3 lines. — Ferruginous, with a black longitudinal 

 groove on the mesothorax ; the pectus with two black spots, and 

 the intermediate and posterior femora blackish at their base 

 beneath ; the metathorax with white short downy pubescence, 

 more or less black at the base ; wings hyaline and narrowly bor- 

 dered with fuscous at their apex. Abdomen subpetiolate, ferru- 

 ginous, with a black fascia on the apical margin of the first seg- 

 ment, and a black spot on each side of it ; the second segment with 

 a broad black fascia at its apical margin, widest in the middle, the 

 ferruginous portion is bordered with yellow at its base ; the third 

 segment s is blackish, and the two following have each two large 

 yellow macula? which unite in the middle of the segment. 



Hab. Bombay district. 



2. Nomada infrequens. 



Female. Length 3| lines. — Yellow, with black and ferruginous 

 markings. The vertex and a space above the clypeus black; the 

 flagellum of the antenna? pale ferruginous. The mesothorax 

 black, narrowly bordered with yellow, and, as well as the scu- 

 tellum, coarsely punctured ; it has also two narrow indistinct fer- 

 ruginous lines on the disk; the scutellum slightly elevated and 

 produced backwards, projecting over the base of the metathorax; 

 the postscutellum and the enclosed space beneath it ferruginous ; 

 the pectus with a curved dark fusco-ferruginous stain ; the legs 

 pale ferruginous, with the posterior coxa? yellow beneath ; wings 

 fusco-hyaline. Abdomen with the first segment dark ferruginous, 

 with a narrow yellow margin ; the second is similarly coloured, but 

 lighter ; the following segments are black at the base, and with 

 yellow apical margins. 



Hab. Brazil, St. Paulo. 



3. Nomada nigrocincta. 



Female. Length 4 lines. — Ferruginous, with black markings, the 

 abdomen with black fascia? on the apical margins of the segments, 

 the base of the first segment also black. Two black spots on the 

 clypeus, and the ocelli enclosed in a black macula. The meso- 

 thorax with a black central groove ; the metathorax black, with 

 dense white pubescence laterally, and having two narrow ferru- 

 ginous lines ; the femora black at their base beneath ; wings sub- 

 hyaline, with a clear hyaline spot beyond the submarginal cells ; 

 the nervures ferruginous. 



Hab. Arctic America. 



