AMERICAN IIYMENOPTERA. 223 



Abdomen above more or less clothed with dense ferruginous pubescence, 

 not spotted with black. 

 Abdomen above, expect first and base of second segments, ferrugi- 

 nous. 



Head broad, quadrate 22. gorgon. 



Head of usual size and shape 21. orcus- 



Abdomen above, except first and base of second segment, ochrace- 



ous 23. Zelaya. 



Second segment of abdomen ferruginous ; size small 44. Waco. 



Head and thorax above blackish-brown ; abdomen yellowish ferrngi- 

 nous, base and a band beyond second segment 



black 24. Comanche. 



Head entirely black; thorax and second abdominal segment above 



yellowish ferruginous, remainder black .36. medea. 



Head and thorax above with oohraceous or ferruginous pubescence. 



Femora and base of tibiae with ocliraceous pubescence 2(j. magna. 



Legs entirely black. 



Head broader than thorax, subquadrate 27. aureola. 



Head of usual size and shape. 



Abdomen above, except base, ferruginous 28. californica. 



Abdomen above, except base, coecineous 32. coecineoliirta. 



Second and base of third abdominal segments above, ferrugi- 

 nous 3^- creusa. 



Abdomen (as well as head and thorax) above with short, dense, 

 coecineous pubescence; first; base and apex of second and 



third segments entirely, black 34. occidentalis 



Bodv brown; head, thorax and second abdominal segment above with dense 

 ferruginous pubescence 

 Legs black, with pubescence entirely black; abdomen behind second seg- 

 ment entirely black 30, bellona. 



Legs black, with mixed black and ocliraceous pubescence; abdominal seg- 

 ments fringed at apex with ochraceous 31. .ffigina. 



Body black, more or less clothed with a golden or ochraceous pubescence. 

 Abdomen ornamented with spots of various shapes and proportions. 

 Thorax above with a large discoidal black spot. 



Abdomen with a large central black spot on second segment, connected 

 with a small spot on each side ; behind second segment two 



large quadrate black spots 57. Cressoni. 



Abdomen with a large trilobate black spot on second segment ;ind a 



black si:)ot at apex C2. arachnoides. 



Thorax above with a transverse, subovate, black mark, not reaching an- 

 terior margin. 

 Legs and abdomen black, second segment with two large silvery spots 



almost confluent on the disc 63. formosa. 



Legs anil second abdominal segment ferruginous, the latter wiih a 

 median black si)ot at base and a broad black apical 



band 61. Balopilas. 



Thorax with anterior portion more or less black. 



Head entirely black; second abdominal segment with three bhu-k 

 spots, central one large, subovate 60 Ariadne. 



